1. Department of Paediatric Dentistry; Medical University of Warsaw; Warsaw Poland
2. Department of Paediatric Oral Surgery; Children's Memorial Health Institute; Warsaw Poland
3. Department of Experimental Statistics and Bioinformatics; Warsaw University of Life Sciences; Warsaw Poland
4. Private Practice; Warsaw Poland
5. Department of Gastroenterology, Hepatology, Nutritional Disorders and Pediatrics; Children's Memorial Health Institute; Warsaw Poland