1. 1 Pediatric department, “Mother Teresa” Hospital - Tirana , Tirana , Albania
2. 2 Service of pediatric gastroenterology, “Mother Teresa” Hospital - Tirana , Tirana , Albania
3. 3 Service of pediatric radiology “Mother Teresa” Hospital - Tirana , Tirana , Albania
4. 4 Service of pediatric anesthesiology “Mother Teresa” Hospital - Tirana , Tirana , Albania
5. 5 Service of pediatric nephrology “Mother Teresa” Hospital - Tirana , Tirana , Albania