1. Faculty of Medicine, University of Medicine, Rr. “Dibres”, No. 371, 8185 Tirana, Albania
2. “Schools for Health”, a Project of the Swiss Development and Cooperation (SDC) Agency, Rr. “Mihal Popi”, 8185 Tirana, Albania
3. Faculty of Natural Sciences, University of Tirana, Bulevardi Zogu I, 1001 Tirana, Albania
4. Department of International Health, CAPHRI (Care and Public Health Research Institute), Maastricht University, 6200 MD Maastricht, The Netherlands