[1] Univ Lausanne, Ctr Primary Care & Publ Hlth Unisante, Dept Ambulatory Care, Rue Bugnon 44, CH-1011 Lausanne, Switzerland
[2] HFR Fribourg Cantonal Hosp, Dept Internal Med, Chem Pensionnats 2-6, CH-1752 Villars Sur Glane, Switzerland
[3] Bienne Hosp Ctr, Dept Internal Med, Chante Merle 84, CH-2501 Biel, Switzerland
[4] Lausanne Univ Hosp CHUV, Div Internal Med, Rue Bugnon 46, CH-1011 Lausanne, Switzerland
[5] Neuchatel Hosp Network, Dept Internal Med, Rue Maladiere 45, CH-2000 Neuchatel, Switzerland
[6] Univ Geneva, Geneva Univ Hosp HUG, Dept Internal Med, Rue Gabrielle Perret Gentil 4, CH-1205 Geneva, Switzerland
[7] Univ Bern, Fac Med, Clin Trials Unit Bern, Mittelstr 43, CH-3012 Bern, Switzerland
[8] Univ Bern, Bern Univ Hosp, Dept Internal Med, Freiburgstr 18, CH-3010 Bern, Switzerland
[9] Harvard Med Sch, Brigham & Womens Hosp, Div Gen Internal Med, 1620 Tremont St BC-3, Boston, MA 02120 USA