Department of Pediatrics, Jagiellonian University, Wielicka 265, 30-663 Cracow, Poland. Department of Electroradiology, Jagiellonian University, Michalowskiego 12, 31-126 Cracow, Poland. Department of Radiology, Jagiellonian University, Kopernika 19, 31-501 Krakow, Poland. Department of Applied Psychology and Human Development, Jagiellonian University, Wielicka 265, 30-663 Cracow, Poland.