Peritoneal drainage vs. laparotomy as initial surgery for perforated necrotising enterocolitis or spontaneous intestinal perforation: experience from a level III Neonatal Intensive Care Unit in the largest paediatric hospital in southern Poland - Parfenchyk, Viktoryia; Kwinta, Przemko; Starzec, Katarzyna (Pediatria Polska - Polish Journal of Paediatrics, 2024)