HAMERLA, A., GAWRON, J., SZYDŁOWSKI, R., BODERA, M. , PORWOLIK, H., PORWOLIK, A., CZARNECKI, B., KAŹMIERSKA, A., GRAJCAREK, ŁUKASZ and CYRAN, P. 2026. The Effect of Excessive Smartphone Use on Mental Wellbeing, Sleep Quality and Active Lifestyle Behaviours. Pakistan Journal of Medical & Health Sciences. 20, 01 (Jan. 2026), 3–6. DOI:https://doi.org/10.53350/pjmhs02026201.2.