[1] Univ Roma La Sapienza, Fac Med 2, Dept Cardiol, I-00189 Rome, Italy
[2] IRCCS Neuromed, Pozzilli, IS, Italy
[3] Albert Einstein Coll Med, Dept Epidemiol & Populat Hlth, Bronx, NY 10467 USA
[4] Wake Forest Univ, Sch Med, Winston Salem, NC 27109 USA
[5] Univ Auckland, Fac Med & Hlth Sci, Sch Populat Hlth, Epidemiol & Biostat Sect, Auckland 1, New Zealand
[6] Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, New Brunswick, NJ USA
[7] Cornell Univ, Coll Med, New York, NY 10021 USA
[8] Univ Washington, Dept Med, Seattle, WA 98195 USA
[9] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA
[10] Univ Washington, Hlth Serv, Seattle, WA 98195 USA
[11] Hosp 12 Octubre, Chief Hypertens Unit, E-28041 Madrid, Spain