[1] AQUA Inst Appl Qual Improvement & Res Hlth Care, Maschmuhlenweg 8, D-37073 Gottingen, Germany
[2] Hannover Med Sch, Inst Epidemiol Social Med & Hlth Syst Res, Carl Neuberg Str 1, D-30625 Hannover, Germany
[3] Radboud Univ Nijmegen, Med Ctr, Radboud Inst Hlth Sci, Geert Grootepl 21, NL-6500 HB Nijmegen, Netherlands
[4] Danish Clin Registries, Olaf Palmes Alle 15, DK-8200 Aarhus, Denmark
[5] Direct Ameliorat Qualite & Securite Soins, Haute Autorite Sante 2,Ave Stade France, F-93218 La Plaine St Denis, France
[6] Natl Board Hlth & Welf, Ralambsvagen 3, SE-10630 Stockholm, Sweden
[7] Hebrew Univ Jerusalem Hadassah Hosp & Med Sch, Braun Sch Publ Hlth & Community Med, Jerusalem, Israel
[8] Kantar Hlth, Hlth Outcomes Practice, Jerusalem, Israel
[9] Direkt Bere Kranken & Unfallversicherung, Bundesamt Gesundheit BAG, Schwarzenburgerstr 175, CH-3003 Bern, Switzerland
[10] Healthcare Improvement Scotland, Delta House,50 West Nile St, Glasgow G1 2NP, Lanark, Scotland
[11] Univ Heidelberg Hosp, Dept Gen Practice & Hlth Serv Res, Vossstr 2, D-69115 Heidelberg, Germany