Rubenstein L Z, Powers C M, MacLean C H
Geriatric Research Education and Clinical Center, Sepulveda Veterans Affairs Medical Center, 16 111 Plummer Street, 11E, Sepulveda, CA 91343, USA.
Ann Intern Med. 2001 Oct 16;135(8 Pt 2):686-93. doi: 10.7326/0003-4819-135-8_part_2-200110161-00007.