Problematic Internet Use among Adults: A Cross-Cultural Study in 15 Countries - Lopez-Fernandez, O.; Romo, L.; Kern, L.; Rousseau, A.; Lelonek-Kuleta, B.; Chwaszcz, J.; Männikkö, N.; Rumpf, H.-J.; Bischof, A.; Király, O.; Gässler, A.-K.; Graziani, P.; et al. (Journal of Clinical Medicine, 2023)