[1] Ctr Hlth & Social Econ, Natl Inst Hlth & Welf, Helsinki, Finland
[2] Hanken Sch Econ, Dept Finance & Stat, Helsinki, Finland
[3] IMIM Hosp del Mar Res Inst, Epidemiol & Evaluat Dept, Barcelona, Spain
[4] CIDER Epidemiol & Salud Publ CIBERESP, Madrid, Spain
[5] Tech Univ TU Berlin, Dept Hlth Care Management, Berlin, Germany
[6] Inst Res & Informat Hlth Econ, Paris, France
[7] Natl Board Hlth & Welf, Stockholm, Sweden
[8] Natl Inst Hlth & Welf, Serv Syst Res Unit, Helsinki, Finland