[1] Univ Antwerp, Dept Primary & Interdisciplinary Care, Fac Med, B-2610 Antwerp, Belgium
[2] Goethe Univ Frankfurt, Inst Gen Practice, Frankfurt, Germany
[3] St Quentin Univ Versailles, Dept Gen Practice, Versailles, France
[4] Ben Gurion Univ Negev, Dept Family Med, Emek Med Ctr, Fac Hlth Sci,Clalit Hlth Serv, IL-84105 Beer Sheva, Israel
[5] Univ Crete, Clin Social & Family Med, Iraklion, Greece
[6] Univ Crete, Dept Social Med, Iraklion, Greece
[7] Vrije Univ Brussel, Dept Youth Hlth, Brussels, Belgium
[8] Univ Ljubljana, Sch Med, Dept Family Med, Ljubljana, Slovenia
[9] Univ Debrecen, Dept Family Med, Debrecen, Hungary
[10] Mediterranean Inst Primary Care, Attard, Malta
[11] Maastricht Univ, Med Ctr, Dept Gen Practice, Sch Publ Hlth & Primary Care CAPHRI, Maastricht, Netherlands
[12] Acibadem Univ, Dept Family Med, Istanbul, Turkey
[13] Middle E Tech Univ, Med Ctr, TR-06531 Ankara, Turkey
[14] Hannover Med Sch, Inst Gen Practice, D-3000 Hannover, Germany