Peptic ulcer disease in children: An uncommon disorder with subtle symptomatology - ÖMÜR ECEVİT, Çiğdem; ÖZGENÇ, Funda; YÜKSEKKAYA, Hasan Ali; Ünal, Fatih; ARIKAN, Çiğdem; YAĞCI, Raşit Vural (Turkish Journal of Gastroenterology, 2012)