American College of Physicians, Annals of Internal Medicine, 1(169), p. 67
DOI: 10.7326/l18-0182
American College of Physicians, Annals of Internal Medicine, 1(169), p. 67
DOI: 10.7326/l18-0180
American College of Physicians, Annals of Internal Medicine, 1(169), p. 66
DOI: 10.7326/l18-0181
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