1. Clinic of Pediatrics, Faculty of Medicine, Vilnius University, 03101 Vilnius, Lithuania
2. Vilnius University Hospital Santaros Klinikos, 08406 Vilnius, Lithuania
3. Faculty of Fundamental Sciences, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania
4. Health Research Laboratory, Mykolas Romeris University, 08303 Vilnius, Lithuania