Hsu Amy, Gan Siqi, Cenzer-Stijacic Irena, Lee Sei J
Department of Geriatrics, Palo Alto Medical Foundation, Palo Alto, California.
Division of Geriatrics, University of California, San Francisco.
JAMA Intern Med. 2017 Jan 1;177(1):130-132. doi: 10.1001/jamainternmed.2016.6949.