1. Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children’s Memorial Health Institute, Warsaw, Poland
2. Laboratory of Genetics, Department of Gymnastics and Dance, University School of Physical Education, Poznan, Poland
3. Department of Sport, Faculty of Physical Education, University of Rzeszow, Rzeszow, Poland
4. Department of Human Sciences, Faculty of Physical Education, University of Rzeszow, Rzeszow, Poland