[1] Med Univ Silesia, Dept Pediat Zabrze, Katowice, Poland
[2] Med Univ Silesia, Clin Pediat Zabrze, Katowice, Poland
[3] Med Univ Silesia, Metab Bone Dis Unit Zabrze, Dept Internal Dis Diabetol & Nephrol, Katowice, Poland
[4] Med Univ Silesia, Metab Bone Dis Unit Zabrze, Clin Internal Dis Diabetol & Nephrol, Katowice, Poland
[5] Specialist Hosp 2, Dept Obstet & Gynaecol, Div Neonatol, Bytom, Poland
[6] Allergomed Outpatient Med Care, Gliwice, Poland
[7] Med Univ Silesia, Dept Pathomorphol Zabrze, Katowice, Poland