1. Schools for Health’, a project of the Swiss Development and Cooperation (SDC) Agency ‘ , Rr. “Mihal Popi”, 8185 Tirana , Albania
2. Faculty of Natural Sciences, University of Tirana , Bulevardi Zogu I, 1001 Tirana , Albania
3. Department of Public Health, Faculty of Medicine, University of Medicine , Rr. “Dibres”, No. 371, 8185 Tirana , Albania
4. Department of International Health, School CAPHRI (Care and Public Health Research Institute), Maastricht University , Duboisdomein 30, 6229 GT Maastricht , The Netherlands