[1] Dept Pediat Cardiol, Skopje, North Macedonia
[2] Univ Ljubljana, Fac Med, Ljubljana, Slovenia
[3] Riga Stradins Univ, Dept Family Med, Riga, Latvia
[4] COBALT Latvia, Riga, Latvia
[5] Gen Hosp Jesenice, Jesenice, Slovenia
[6] Univ Med Ctr Ljubljana, Clin Inst Radiol, Ljubljana, Slovenia
[7] Katholieke Univ Leuven, Dept Publ Hlth & Primary Care, Leuven, Belgium
[8] Hannover Med Sch, Ctr Publ Hlth & Healthcare, Dept Med Psychol, D-30625 Hannover, Germany
[9] Katholieke Univ Leuven, Leuven Biostats, Biomed Sci, Leuven, Belgium
[10] Univ Montenegro, Fac Med, Dept Family Med, Podgorica, Montenegro
[11] Spiru Haret Univ, Dept Kinet Therapy & Special Motr, Bucharest, Romania
[12] Natl Romanian Televis, Med Dept, Bucharest, Romania
[13] Individual Med Off Family Med Dr Busneag Carmen, Bucharest, Romania
[14] Natl Soc Med Educ Gen Practice SNAMID, Caserta, Italy
[15] Univ Ljubljana, Fac Med, Dept Family Med, Ljubljana, Slovenia
[16] Sch Ctr Skofja Loka, Podlubnik 1b, Skofja Loka 4220, Slovenia
[17] Univ Halle Wittenberg, Fac Med, Dept Pathol, Halle, Germany
[18] Sofia Univ St Kliment Ohridski, Fac Med, Gen Med, Sofia, Bulgaria
[19] Natl Assoc Gen Practitioners, Sofia, Bulgaria
[20] Publ Inst Hlth Ctr Sarajevo Canton, Sarajevo, Bosnia & Herceg
[21] Univ Sarajevo, Fac Med, Sarajevo, Bosnia & Herceg
[22] Univ Aleksander Xhuvani, Fac Tech Med Sci, Nursing Dept, Elbasan, Albania
[23] Assoc Teachers Gen Practice Family Med, Zagreb, Croatia
[24] Hlth Ctr Zagreb Ctr, Zagreb, Croatia
[25] APICURA, Zagreb, Croatia
[26] Inst Publ Hlth, Dept Natl Reference Labs, Tirana, Albania