Stepwise diet management in pediatric gastrointestinal graft versus host disease - Nevra Koç; Mehmet Gündüz; M Fatih Azık; Betül Tavil; Dilek Gürlek-Gökçebay; Eda Özaydın; Bahattin Tunç; Duygu Uçkan (The Turkish Journal of Pediatrics)