1. Division of Geriatrics University of Sao Paulo Medical SchoolSao PauloBrazil
2. Division of GeriatricsUniversity of CaliforniaSan FranciscoCalifornia
3. Veterans Affairs Medical CenterSan FranciscoCalifornia
4. Department of Neurology, Memory and Aging CenterUniversity of CaliforniaSan FranciscoCalifornia
5. Departments of Psychiatry and EpidemiologyUniversity of CaliforniaSan FranciscoCalifornia