[1] Natl Sch Publ Hlth, Hlth Serv Org & Management, Athens, Greece
[2] Aghia Sophia Childrens Hosp, Collaborat Ctr Clin Epidemiol & Outcomes Res CLEO, Athens, Greece
[3] Novartis Hellas SACI SA, Athens, Greece
[4] Univ Athens, Hosp Venereol Dermatol Dis A Syggros, Athens, Greece
[5] Aristoteleio Univ Thessaloniki, Hosp Skin & Venereal Dis, Thessaloniki, Greece
[6] Hosp Skin & Venereal Dis, Dermatol Clin, Thessaloniki, Greece
[7] Hosp Venereol Dermatol Dis A Syggros, Dermatol Clin, Athens, Greece
[8] Univ Athens, Attikon Univ Hosp Athens, Athens, Greece
[9] Univ Thessaly, Univ Hosp Larissa, Larisa, Greece
[10] Aristoteleio Univ Thessaloniki, Gen Hosp Thessaloniki PAPAGEORGIOU, Thessaloniki, Greece