1. San Diego VAMC, UC San Diego; Dept of Internal Medicine; 3350 La Jolla Village Drive , 111N San Diego CA USA 92161
2. University of California, San Franciso; Medicine and Epidemiology and Biostatistics; 4150 Clement Street VAMC (111A1) San Franciso California USA 92121
3. Hopital Cardio-Vasculaire et Pneumologique Louis Pradel; Centre d'Investigation Clinique - CIC de Lyon; 28 Avenue du Doyen Lépine Bron CEDEX France 69677