Cummings Steven R, Kiel Douglas P, Black Dennis M
California Pacific Medical Center Research Institute, San Francisco2Department of Epidemiology and Biostatistics, University of California San Francisco.
Institute for Aging Research, Hebrew SeniorLife, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
JAMA Intern Med. 2016 Feb;176(2):171-2. doi: 10.1001/jamainternmed.2015.7568.