[1] Karol Marcinkowski University of Medical Sciences in Poznań,
[2] Clinic of Paediatrics,undefined
[3] Department of Cardiology and Nephrology,undefined
[4] ul. Szpitalna 27/33,undefined
[5] 60-572 Poznań,undefined
[6] Poland Fax: (48 61) 483362,undefined
[7] Department of Paediatric Surgery,undefined
[8] Karol Marcinkowski University of Medical Sciences in Poznań,undefined
[9] Poland,undefined