JAMA: Most-Read Full-Text Articles http://jama.ama-assn.org/ Most-read rankings are recalculated at the beginning of the month based on usage of full-text and PDF views for the previous month. 2009-11-11 <![CDATA[Surgical Mask vs N95 Respirator for Preventing Influenza Among Health Care Workers: A Randomized Trial]]> http://jama.ama-assn.org/cgi/content/short/2009.1466v1?rss=1&ssource=mfc Nov 4, 2009; 302:1865-1871
Original Contribution]]> Mark Loeb, Nancy Dafoe, James Mahony, Michael John, Alicia Sarabia, Verne Glavin, Richard Webby, Marek Smieja, David J. D. Earn, Sylvia Chong, Ashley Webb, Stephen D. Walter 2009-11-04 American Medical Association <![CDATA[Critically Ill Patients With 2009 Influenza A(H1N1) Infection in Canada]]> http://jama.ama-assn.org/cgi/content/short/2009.1496v1?rss=1&ssource=mfc Nov 4, 2009; 302:1872-1879
Caring for the Critically Ill Patient]]> Anand Kumar, Ryan Zarychanski, Ruxandra Pinto, Deborah J. Cook, John Marshall, Jacques Lacroix, Tom Stelfox, Sean Bagshaw, Karen Choong, Francois Lamontagne, Alexis F. Turgeon, Stephen Lapinsky, Stephane P. Ahern, Orla Smith, Faisal Siddiqui, Philippe Jouvet, Kosar Khwaja, Lauralyn McIntyre, Kusum Menon, Jamie Hutchison, David Hornstein, Ari Joffe, Francois Lauzier, Jeffrey Singh, Tim Karachi, Kim Wiebe, Kendiss Olafson, Clare Ramsey, Sat Sharma, Peter Dodek, Maureen Meade, Richard Hall, Robert A. Fowler, for the Canadian Critical Care Trials Group H1N1 Collaborative 2009-11-04 American Medical Association <![CDATA[Respiratory Protection Against Influenza]]> http://jama.ama-assn.org/cgi/content/short/2009.1494v1?rss=1&ssource=mfc Nov 4, 2009; 302:1903-1904
Editorial]]> Arjun Srinivasan, Trish M. Perl 2009-11-04 American Medical Association <![CDATA[Rethinking Screening for Breast Cancer and Prostate Cancer]]> http://jama.ama-assn.org/cgi/content/short/302/15/1685?rss=1&ssource=mfc Oct 21, 2009; 302:1685-1692
Special Communication]]> Laura Esserman, Yiwey Shieh, Ian Thompson 2009-10-21 10.1001/jama.2009.1498 American Medical Association <![CDATA[The Risks and Benefits of HPV Vaccination]]> http://jama.ama-assn.org/cgi/content/short/302/7/795?rss=1&ssource=mfc Aug 19, 2009; 302:795-796
Editorial]]> Charlotte Haug 2009-08-19 10.1001/jama.2009.1215 American Medical Association <![CDATA[Extracorporeal Membrane Oxygenation for 2009 Influenza A(H1N1) Acute Respiratory Distress Syndrome]]> http://jama.ama-assn.org/cgi/content/short/2009.1535v1?rss=1&ssource=mfc Nov 4, 2009; 302:1888-1895
Caring for the Critically Ill Patient]]> The Australia and New Zealand Extracorporeal Membrane Oxygenation (ANZ ECMO) Influenza Investigators 2009-11-04 American Medical Association <![CDATA[Preparing for the Sickest Patients With 2009 Influenza A(H1N1)]]> http://jama.ama-assn.org/cgi/content/short/2009.1539v1?rss=1&ssource=mfc Nov 4, 2009; 302:1905-1906
Editorial]]> Douglas B. White, Derek C. Angus 2009-11-04 American Medical Association <![CDATA[Critically Ill Patients With 2009 Influenza A(H1N1) in Mexico]]> http://jama.ama-assn.org/cgi/content/short/2009.1536v1?rss=1&ssource=mfc Nov 4, 2009; 302:1880-1887
Caring for the Critically Ill Patient]]> Guillermo Dominguez-Cherit, Stephen E. Lapinsky, Alejandro E. Macias, Ruxandra Pinto, Lourdes Espinosa-Perez, Alethse de la Torre, Manuel Poblano-Morales, Jose A. Baltazar-Torres, Edgar Bautista, Abril Martinez, Marco A. Martinez, Eduardo Rivero, Rafael Valdez, Guillermo Ruiz-Palacios, Martin Hernandez, Thomas E. Stewart, Robert A. Fowler 2009-11-04 American Medical Association <![CDATA[Outcomes Following Endovascular vs Open Repair of Abdominal Aortic Aneurysm: A Randomized Trial]]> http://jama.ama-assn.org/cgi/content/short/302/14/1535?rss=1&ssource=mfc Oct 14, 2009; 302:1535-1542
Original Contribution]]> Frank A. Lederle, Julie A. Freischlag, Tassos C. Kyriakides, Frank T. Padberg Jr, Jon S. Matsumura, Ted R. Kohler, Peter H. Lin, Jessie M. Jean-Claude, Dolores F. Cikrit, Kathleen M. Swanson, Peter N. Peduzzi, for the Open Versus Endovascular Repair (OVER) Veterans Affairs Cooperative Study Group 2009-10-14 10.1001/jama.2009.1426 American Medical Association <![CDATA[Comparative Effectiveness of Minimally Invasive vs Open Radical Prostatectomy]]> http://jama.ama-assn.org/cgi/content/short/302/14/1557?rss=1&ssource=mfc Oct 14, 2009; 302:1557-1564
Original Contribution]]> Jim C. Hu, Xiangmei Gu, Stuart R. Lipsitz, Michael J. Barry, Anthony V. D''Amico, Aaron C. Weinberg, Nancy L. Keating 2009-10-14 10.1001/jama.2009.1451 American Medical Association <![CDATA[A 52-Year-Old Woman With Disabling Peripheral Neuropathy: Review of Diabetic Polyneuropathy]]> http://jama.ama-assn.org/cgi/content/short/302/13/1451?rss=1&ssource=mfc Oct 7, 2009; 302:1451-1458
Clinical Crossroads]]> Seward B. Rutkove 2009-10-07 American Medical Association <![CDATA[Omega-3 Augmentation of Sertraline in Treatment of Depression in Patients With Coronary Heart Disease: A Randomized Controlled Trial]]> http://jama.ama-assn.org/cgi/content/short/302/15/1651?rss=1&ssource=mfc Oct 21, 2009; 302:1651-1657
Original Contribution]]> Robert M. Carney, Kenneth E. Freedland, Eugene H. Rubin, Michael W. Rich, Brian C. Steinmeyer, William S. Harris 2009-10-21 10.1001/jama.2009.1487 American Medical Association <![CDATA[High Body Mass Index for Age Among US Children and Adolescents, 2003-2006]]> http://jama.ama-assn.org/cgi/content/short/299/20/2401?rss=1&ssource=mfc May 28, 2008; 299:2401-2405
Original Contribution]]> Cynthia L. Ogden, Margaret D. Carroll, Katherine M. Flegal 2008-05-28 10.1001/jama.299.20.2401 American Medical Association <![CDATA[Bovine Lactoferrin Supplementation for Prevention of Late-Onset Sepsis in Very Low-Birth-Weight Neonates: A Randomized Trial]]> http://jama.ama-assn.org/cgi/content/short/302/13/1421?rss=1&ssource=mfc Oct 7, 2009; 302:1421-1428
Original Contribution]]> Paolo Manzoni, Matteo Rinaldi, Silvia Cattani, Lorenza Pugni, Mario Giovanni Romeo, Hubert Messner, Ilaria Stolfi, Lidia Decembrino, Nicola Laforgia, Federica Vagnarelli, Luigi Memo, Linda Bordignon, Onofrio Sergio Saia, Milena Maule, Elena Gallo, Michael Mostert, Cristiana Magnani, Michele Quercia, Lina Bollani, Roberto Pedicino, Livia Renzullo, Pasqua Betta, Fabio Mosca, Fabrizio Ferrari, Rosario Magaldi, Mauro Stronati, Daniele Farina, for the Italian Task Force for the Study and Prevention of Neonatal Fungal Infections, the Italian Society of Neonatology 2009-10-07 10.1001/jama.2009.1403 American Medical Association <![CDATA[The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure: The JNC 7 Report]]> http://jama.ama-assn.org/cgi/content/short/289.19.2560v1?rss=1&ssource=mfc May 21, 2003; 289:2560-2571
Special Communication]]> Aram V. Chobanian, George L. Bakris, Henry R. Black, William C. Cushman, Lee A. Green, Joseph L. Izzo Jr, Daniel W. Jones, Barry J. Materson, Suzanne Oparil, Jackson T. Wright Jr, Edward J. Roccella 2003-05-21 American Medical Association <![CDATA[Use of Aldosterone Antagonists in Heart Failure]]> http://jama.ama-assn.org/cgi/content/short/302/15/1658?rss=1&ssource=mfc Oct 21, 2009; 302:1658-1665
Original Contribution]]> Nancy M. Albert, Clyde W. Yancy, Li Liang, Xin Zhao, Adrian F. Hernandez, Eric D. Peterson, Christopher P. Cannon, Gregg C. Fonarow 2009-10-21 10.1001/jama.2009.1493 American Medical Association <![CDATA[Risk of Adverse Outcomes Associated With Concomitant Use of Clopidogrel and Proton Pump Inhibitors Following Acute Coronary Syndrome]]> http://jama.ama-assn.org/cgi/content/short/301/9/937?rss=1&ssource=mfc Mar 4, 2009; 301:937-944
Original Contribution]]> P. Michael Ho, Thomas M. Maddox, Li Wang, Stephan D. Fihn, Robert L. Jesse, Eric D. Peterson, John S. Rumsfeld 2009-03-04 10.1001/jama.2009.261 American Medical Association <![CDATA[Association Between CYP2D6 Polymorphisms and Outcomes Among Women With Early Stage Breast Cancer Treated With Tamoxifen]]> http://jama.ama-assn.org/cgi/content/short/302/13/1429?rss=1&ssource=mfc Oct 7, 2009; 302:1429-1436
Original Contribution]]> Werner Schroth, Matthew P. Goetz, Ute Hamann, Peter A. Fasching, Marcus Schmidt, Stefan Winter, Peter Fritz, Wolfgang Simon, Vera J. Suman, Matthew M. Ames, Stephanie L. Safgren, Mary J. Kuffel, Hans Ulrich Ulmer, Julia Bolander, Reiner Strick, Matthias W. Beckmann, Heinz Koelbl, Richard M. Weinshilboum, James N. Ingle, Michel Eichelbaum, Matthias Schwab, Hiltrud Brauch 2009-10-07 10.1001/jama.2009.1420 American Medical Association <![CDATA[Assessing Authority]]> http://jama.ama-assn.org/cgi/content/short/301/17/1819?rss=1&ssource=mfc May 6, 2009; 301:1819-1821
JAMA Classics]]> Drummond Rennie, Iain Chalmers 2009-05-06 10.1001/jama.2009.559 American Medical Association <![CDATA[Commercial Features of Placebo and Therapeutic Efficacy]]> http://jama.ama-assn.org/cgi/content/short/299/9/1016?rss=1&ssource=mfc Mar 5, 2008; 299:1016-1017
Research Letters]]> Rebecca L. Waber, Baba Shiv, Ziv Carmon, Dan Ariely 2008-03-05 10.1001/jama.299.9.1016 American Medical Association <![CDATA[Prevalence of Overweight and Obesity in the United States, 1999-2004]]> http://jama.ama-assn.org/cgi/content/short/295/13/1549?rss=1&ssource=mfc Apr 5, 2006; 295:1549-1555
Original Contribution]]> Cynthia L. Ogden, Margaret D. Carroll, Lester R. Curtin, Margaret A. McDowell, Carolyn J. Tabak, Katherine M. Flegal 2006-04-05 10.1001/jama.295.13.1549 American Medical Association <![CDATA[Using Effectiveness and Cost-effectiveness to Make Drug Coverage Decisions: A Comparison of Britain, Australia, and Canada]]> http://jama.ama-assn.org/cgi/content/short/302/13/1437?rss=1&ssource=mfc Oct 7, 2009; 302:1437-1443
Original Contribution]]> Fiona M. Clement, Anthony Harris, Jing Jing Li, Karen Yong, Karen M. Lee, Braden J. Manns 2009-10-07 10.1001/jama.2009.1409 American Medical Association <![CDATA[Pulmonary Hypertension]]> http://jama.ama-assn.org/cgi/content/short/302/13/1490?rss=1&ssource=mfc Oct 7, 2009; 302:1490-1490
JAMA Patient Page]]> John L. Zeller, Alison E. Burke, Richard M. Glass 2009-10-07 10.1001/jama.302.13.1490 American Medical Association <![CDATA[Cardiometabolic Risk of Second-Generation Antipsychotic Medications During First-Time Use in Children and Adolescents]]> http://jama.ama-assn.org/cgi/content/short/302/16/1765?rss=1&ssource=mfc Oct 28, 2009; 302:1765-1773
Original Contribution]]> Christoph U. Correll, Peter Manu, Vladimir Olshanskiy, Barbara Napolitano, John M. Kane, Anil K. Malhotra 2009-10-28 10.1001/jama.2009.1549 American Medical Association <![CDATA[Association of an Educational Program in Mindful Communication With Burnout, Empathy, and Attitudes Among Primary Care Physicians]]> http://jama.ama-assn.org/cgi/content/short/302/12/1284?rss=1&ssource=mfc Sep 23, 2009; 302:1284-1293
Original Contribution]]> Michael S. Krasner, Ronald M. Epstein, Howard Beckman, Anthony L. Suchman, Benjamin Chapman, Christopher J. Mooney, Timothy E. Quill 2009-09-23 10.1001/jama.2009.1384 American Medical Association <![CDATA[Effect of Procalcitonin-Based Guidelines vs Standard Guidelines on Antibiotic Use in Lower Respiratory Tract Infections: The ProHOSP Randomized Controlled Trial]]> http://jama.ama-assn.org/cgi/content/short/302/10/1059?rss=1&ssource=mfc Sep 9, 2009; 302:1059-1066
Original Contribution]]> Philipp Schuetz, Mirjam Christ-Crain, Robert Thomann, Claudine Falconnier, Marcel Wolbers, Isabelle Widmer, Stefanie Neidert, Thomas Fricker, Claudine Blum, Ursula Schild, Katharina Regez, Ronald Schoenenberger, Christoph Henzen, Thomas Bregenzer, Claus Hoess, Martin Krause, Heiner C. Bucher, Werner Zimmerli, Beat Mueller, for the ProHOSP Study Group 2009-09-09 10.1001/jama.2009.1297 American Medical Association <![CDATA[Hospital Nurse Staffing and Patient Mortality, Nurse Burnout, and Job Dissatisfaction]]> http://jama.ama-assn.org/cgi/content/short/288/16/1987?rss=1&ssource=mfc Oct 23, 2002; 288:1987-1993
Original Contribution]]> Linda H. Aiken, Sean P. Clarke, Douglas M. Sloane, Julie Sochalski, Jeffrey H. Silber 2002-10-23 10.1001/jama.288.16.1987 American Medical Association <![CDATA[How Many Physicians? How Much Does It Matter?]]> http://jama.ama-assn.org/cgi/content/short/302/15/1701?rss=1&ssource=mfc Oct 21, 2009; 302:1701-1702
Editorial]]> Thomas C. Ricketts 2009-10-21 10.1001/jama.2009.1517 American Medical Association <![CDATA[Implications of Marked Weight Gain Associated With Atypical Antipsychotic Medications in Children and Adolescents]]> http://jama.ama-assn.org/cgi/content/short/302/16/1811?rss=1&ssource=mfc Oct 28, 2009; 302:1811-1812
Editorial]]> Christopher K. Varley, Jon McClellan 2009-10-28 10.1001/jama.2009.1558 American Medical Association <![CDATA[This Week in JAMA]]> http://jama.ama-assn.org/cgi/content/short/302/14/1501?rss=1&ssource=mfc Oct 14, 2009; 302:1501-1501
This Week in JAMA]]> 2009-10-14 10.1001/jama.2009.1475 American Medical Association <![CDATA[Uniform Format for Disclosure of Competing Interests in ICMJE Journals]]> http://jama.ama-assn.org/cgi/content/short/2009.1542v1?rss=1&ssource=mfc Oct 13, 2009; 0:20091542-2
Editorial]]> Jeffrey M. Drazen, Martin B. Van Der Weyden, Peush Sahni, Jacob Rosenberg, Ana Marusic, Christine Laine, Sheldon Kotzin, Richard Horton, Paul C. Hebert, Charlotte Haug, Fiona Godlee, Frank A. Frizelle, Peter W. de Leeuw, Catherine D. DeAngelis 2009-10-13 American Medical Association <![CDATA[Manipulation and the Match]]> http://jama.ama-assn.org/cgi/content/short/302/12/1266?rss=1&ssource=mfc Sep 23, 2009; 302:1266-1267
A Piece of My Mind]]> Carl Erik Fisher 2009-09-23 10.1001/jama.2009.1388 American Medical Association <![CDATA[This Week in JAMA]]> http://jama.ama-assn.org/cgi/content/short/302/15/1621?rss=1&ssource=mfc Oct 21, 2009; 302:1621-1621
This Week in JAMA]]> 2009-10-21 10.1001/jama.2009.1509 American Medical Association <![CDATA[Comparison of Liquid-Based Cytology With Conventional Cytology for Detection of Cervical Cancer Precursors: A Randomized Controlled Trial]]> http://jama.ama-assn.org/cgi/content/short/302/16/1757?rss=1&ssource=mfc Oct 28, 2009; 302:1757-1764
Original Contribution]]> Albertus G. Siebers, Paul J. J. M. Klinkhamer, Johanna M. M. Grefte, Leon F. A. G. Massuger, Judith E. M. Vedder, Angelique Beijers-Broos, Johan Bulten, Marc Arbyn 2009-10-28 10.1001/jama.2009.1569 American Medical Association <![CDATA[This Week in JAMA]]> http://jama.ama-assn.org/cgi/content/short/302/13/1395?rss=1&ssource=mfc Oct 7, 2009; 302:1395-1395
This Week in JAMA]]> 2009-10-07 10.1001/jama.2009.1425 American Medical Association <![CDATA[Incidence and Mortality of Hip Fractures in the United States]]> http://jama.ama-assn.org/cgi/content/short/302/14/1573?rss=1&ssource=mfc Oct 14, 2009; 302:1573-1579
Original Contribution]]> Carmen A. Brauer, Marcelo Coca-Perraillon, David M. Cutler, Allison B. Rosen 2009-10-14 10.1001/jama.2009.1462 American Medical Association <![CDATA[Oh, to Live in an Age When Men Had Breasts . . .]]> http://jama.ama-assn.org/cgi/content/short/302/14/1511?rss=1&ssource=mfc Oct 14, 2009; 302:1511-1512
A Piece of My Mind]]> Scott W. Wright 2009-10-14 10.1001/jama.2009.1402 American Medical Association <![CDATA[Risks of Complications by Attending Physicians After Performing Nighttime Procedures]]> http://jama.ama-assn.org/cgi/content/short/302/14/1565?rss=1&ssource=mfc Oct 14, 2009; 302:1565-1572
Original Contribution]]> Jeffrey M. Rothschild, Carol A. Keohane, Selwyn Rogers, Roxane Gardner, Stuart R. Lipsitz, Claudia A. Salzberg, Tony Yu, Catherine S. Yoon, Deborah H. Williams, Matt F. Wien, Charles A. Czeisler, David W. Bates, Christopher P. Landrigan 2009-10-14 10.1001/jama.2009.1423 American Medical Association <![CDATA[Risks and Benefits of Estrogen Plus Progestin in Healthy Postmenopausal Women: Principal Results From the Women's Health Initiative Randomized Controlled Trial]]> http://jama.ama-assn.org/cgi/content/short/288/3/321?rss=1&ssource=mfc Jul 17, 2002; 288:321-333
Original Contribution]]> Writing Group for the Women''s Health Initiative Investigators 2002-07-17 10.1001/jama.288.3.321 American Medical Association <![CDATA[Japanese Encephalitis Among Three U.S. Travelers Returning From Asia, 2003-2008]]> http://jama.ama-assn.org/cgi/content/short/302/13/1410?rss=1&ssource=mfc Oct 7, 2009; 302:1410-1412
From the Centers for Disease Control and Prevention]]> 2009-10-07 American Medical Association <![CDATA[The TIMI Risk Score for Unstable Angina/Non-ST Elevation MI: A Method for Prognostication and Therapeutic Decision Making]]> http://jama.ama-assn.org/cgi/content/short/284/7/835?rss=1&ssource=mfc Aug 16, 2000; 284:835-842
Original Contribution]]> Elliott M. Antman, Marc Cohen, Peter J. L. M. Bernink, Carolyn H. McCabe, Thomas Horacek, Gary Papuchis, Branco Mautner, Ramon Corbalan, David Radley, Eugene Braunwald 2000-08-16 10.1001/jama.284.7.835 American Medical Association <![CDATA[Comparison of the Atkins, Zone, Ornish, and LEARN Diets for Change in Weight and Related Risk Factors Among Overweight Premenopausal Women: The A TO Z Weight Loss Study: A Randomized Trial]]> http://jama.ama-assn.org/cgi/content/short/297/9/969?rss=1&ssource=mfc Mar 7, 2007; 297:969-977
Original Contribution]]> Christopher D. Gardner, Alexandre Kiazand, Sofiya Alhassan, Soowon Kim, Randall S. Stafford, Raymond R. Balise, Helena C. Kraemer, Abby C. King 2007-03-07 10.1001/jama.297.9.969 American Medical Association <![CDATA[Disruption and Innovation in Health Care]]> http://jama.ama-assn.org/cgi/content/short/302/13/1465?rss=1&ssource=mfc Oct 7, 2009; 302:1465-1466
Commentary]]> Robert H. Brook 2009-10-07 10.1001/jama.2009.1427 American Medical Association <![CDATA[Online Posting of Unprofessional Content by Medical Students]]> http://jama.ama-assn.org/cgi/content/short/302/12/1309?rss=1&ssource=mfc Sep 23, 2009; 302:1309-1315
Original Contribution]]> Katherine C. Chretien, S. Ryan Greysen, Jean-Paul Chretien, Terry Kind 2009-09-23 10.1001/jama.2009.1387 American Medical Association <![CDATA[Medical Schools in the United States, 2008-2009]]> http://jama.ama-assn.org/cgi/content/short/302/12/1349?rss=1&ssource=mfc Sep 23, 2009; 302:1349-1355
Special Communication]]> Barbara Barzansky, Sylvia I. Etzel 2009-09-23 10.1001/jama.2009.1324 American Medical Association <![CDATA[Can We Agree to Disagree?]]> http://jama.ama-assn.org/cgi/content/short/302/15/1629?rss=1&ssource=mfc Oct 21, 2009; 302:1629-1630
A Piece of My Mind]]> Rebecca L. Sudore 2009-10-21 10.1001/jama.2009.1422 American Medical Association <![CDATA[Hypertrophic Cardiomyopathy]]> http://jama.ama-assn.org/cgi/content/short/302/15/1720?rss=1&ssource=mfc Oct 21, 2009; 302:1720-1720
JAMA Patient Page]]> Huan J. Chang, Cassio Lynm, Richard M. Glass 2009-10-21 10.1001/jama.302.15.1720 American Medical Association <![CDATA[Postlicensure Safety Surveillance for Quadrivalent Human Papillomavirus Recombinant Vaccine]]> http://jama.ama-assn.org/cgi/content/short/302/7/750?rss=1&ssource=mfc Aug 19, 2009; 302:750-757
Original Contribution]]> Barbara A. Slade, Laura Leidel, Claudia Vellozzi, Emily Jane Woo, Wei Hua, Andrea Sutherland, Hector S. Izurieta, Robert Ball, Nancy Miller, M. Miles Braun, Lauri E. Markowitz, John Iskander 2009-08-19 10.1001/jama.2009.1201 American Medical Association <![CDATA[Variation in Event Rates in Trials of Patients With Type 2 Diabetes]]> http://jama.ama-assn.org/cgi/content/short/302/15/1698?rss=1&ssource=mfc Oct 21, 2009; 302:1698-1700
Commentary]]> Bruce M. Psaty, Ross L. Prentice 2009-10-21 10.1001/jama.2009.1497 American Medical Association <![CDATA[Innovation Networks: A Strategy to Transform Primary Health Care]]> http://jama.ama-assn.org/cgi/content/short/302/13/1461?rss=1&ssource=mfc Oct 7, 2009; 302:1461-1462
Commentary]]> Peter Margolis, Neal Halfon 2009-10-07 10.1001/jama.2009.1428 American Medical Association