Annals of Internal Medicine C.2, 154, 509-15 Annals of Internal Medicine Annals of Internal Medicine, 2011, 154 (8), pp.509-15. ⟨10.7326/0003-4819-154-8-201104190-00001⟩ Annals of Internal Medicine, 154(8), 509 Annals of Internal Medicine, 154(8), 509-15. AMER COLL PHYSICIANS Annals of Internal Medicine, Vol. 154, No 8 (2011) pp. 509-15 ResearcherID Annals of Internal Medicine, American College of Physicians, 2011, 154 (8), pp.509-15. ⟨10.7326/0003-4819-154-8-201104190-00001⟩ Annals of Internal Medicine C.2, 154, 8, pp. 509-15 Annals of internal medicine, 154(8), 509-515. American College of Physicians