METHODS
The methods of the GAN study have been already published
elsewhere12 and are mainly identical to those of
ISAAC. GAN is cross-sectional study based on written questionnaires
distributed in schools in the participating centres. In Kosovo, the
survey included the age group of 13-14-years; and six centres:
Ferizaj, Gjakova, Gjilan, Peja,
Prishtina and Prizren. The fieldwork was carried out between 2017 and
2018.