[1] Univ Hosp Geneva, Geneva, Switzerland
[2] Emory Clin, Cardiovas Rsch Inst, Div Cardiol, Atlanta, GA 30322 USA
[3] Dept Med, San Francisco, CA USA
[4] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[5] Clin Rsch Cntr, Inst Social & Prevent Med, Lausanne, Switzerland
[6] Wake Forest Univ, Baptist Med Ctr, Winston Salem, NC 27109 USA
[7] Univ Tennessee, Hlth Sci Ctr, Dept Prevent Med, Memphis, TN USA
[8] NIH, Geriatr Epidemiol Sect, Bethesda, MD 20892 USA
[9] Univ Pittsburgh, Dept Epidemiol, Pittsburgh, PA 15261 USA
[10] Univ Hosp Bern, Dept Gen Internal Med, CH-3010 Bern, Switzerland