[1] Jagiellonian Univ Coll Med, Hyg & Ecol Dept, Krakow, Poland
[2] Jagiellonian Univ Coll Med, Chair Orthodonty, Krakow, Poland
[3] Med Acad, Dept Hyg, Lublin, Poland
[4] L Warynski Silesian Med Acad, Chair Environm Med & Epidemiol, Zabrze, Poland
[5] Inst Social Med, Dept Hyg, Warsaw, Poland