Pseudoxanthoma elasticum: a rare cause of recurrent gastrointestinal bleeding in a child.

1. Kemppainen T, Kroger H, Janatuinen E, Arnala I, LambergAllardt C, Karkainen M, et al. Bone recovery after a glutenfree diet: a 5-year follow-up study. Bone 1999;25:355-60. 2. Bai JC, Gonzales D, Mautalen C, Mazure R, Pedreira S, Vazquez H, et al. Long-term effect of gluten restriction on bone mineral density of patients with coeliac disease. Aliment Pharmacol Ther 1997;11:157-64. 3. Kalyci AG, Kansu A, Girgin N, Kucuk O, Aras G. Bone mineral density and importance of a gluten-free diet in patients with celiac disease in childhood. Pediatrics 2001;108:E89. 4. Pratico G, Caltabiano L, Bottaro G, Palano GM, Rotolo N, Spina M. Serum levels of osteocalcin and type I procollagen in children with celiac disease. J Pediatr Gastroenterol Nutr 1997;24:170-3. 5. Barera G, Beccio S, Proverbio MC, Mora S. Longitudinal changes in bone metabolism and bone mineral content in children with celiac disease during consumption of glutenfree diet. Am J Clin Nutr 2004;79:148-54.