Venuta A, Bertolani P, Garetti E, Venturelli C, Predieri B, Muttini E D, Compagni E
Department of Gynaecology Obstetrics and Paediatrics, University of Modena and Reggio Emilia, Italy.
J Pediatr Gastroenterol Nutr. 1999 Sep;29(3):358-9. doi: 10.1097/00005176-199909000-00023.