American College of Physicians, Annals of Internal Medicine, 1(168), p. 83
DOI: 10.7326/l17-0491
American College of Physicians, Annals of Internal Medicine, 1(168), p. 82
DOI: 10.7326/l17-0492
American College of Physicians, Annals of Internal Medicine, 1(168), p. 83
DOI: 10.7326/l17-0493
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