K. Vult von Steyern, P. Wingren, M. Wiklund, P. Stenstrom and E. Arnbjornsson, “Visualisation of the Rectoanal Inhibitory Reflex with a Modified Contrast Enema in Children with Susected Hirschsprung Disease,” Pediatric Radiology, Vol. 43, No. 8, 2013, pp. 950-957. http://dx.doi.org/10.1007/s00247-013-2622-4
 D. Spouge and P. A. Baird, “Hirschsprung Disease in a Large Birth Cohort,” Teratology, Vol. 32, No. 2, 1985, pp. 171-177. http://dx.doi.org/10.1002/tera.1420320204
 A. Ghosh and D. M. Griffiths, “Rectal Biopsy in the Investigation of Constipation,” Archives of Disease in Childhood, Vol. 79, No. 3, 1998, pp. 266-268. http://dx.doi.org/10.1136/adc.79.3.266
 C. C. Lee, R. Lien, M. C. Chiang, P. H. Yang, S. M. Chu, J. H. Fu and J. Y. Lai, “Clinical Impacts of Delayed Diagnosis of Hirschsprung’s Disease in Newborn Infants,” Pediatrics & Neonatology, Vol. 53, No. 2, 2012, pp. 133-137. http://dx.doi.org/10.1016/j.pedneo.2012.01.011
 J. C. Langer, “50 Years Ago in the Journal of Pediatrics: Rectal Biopsy as an Aid in the Diagnosis of Diseases of Infants and Children,” Journal of Pediatrics, Vol. 162, No. 2, 2013, p. 301.
 W. O. Dobbins and A. H. Bill, “Diagnosis of Hirschsprung’s Disease Excluded by Rectal Suction Biopsy,” The New England Journal of Medicine, Vol. 272, No. 19, 1965, pp. 990-993.
 C. E. Hayes, D. Kawatu, S. Mangray and N. S. LeLeiko, “Rectal Suction Biopsy to Exclude the Diagnosis of Hirschsprung Disease,” Journal of Pediatric Gastroenterology and Nutrition, Vol. 55, No. 3, 2012, pp. 268-271. http://dx.doi.org/10.1097/MPG.0b013e31824c0acc
 E. A. Ali, J. A. Morecroft, J. C. Bowen, J. Bruce and A. Morabito, “Wall or Machine Suction Biopsy for Hirschsprung’s Disease: A Simple Modified Technique Can Improve the Adequacy of Biopsy,” Pediatric Surgery International, Vol. 22, No. 8, 2006, pp. 681-682. http://dx.doi.org/10.1007/s00383-006-1714-8
 N. J. Hall, D. Kufeji and A. Keshtgar, “Out with the Old and in with the New: A Comparison of Rectal Suction Biopsies with Traditional and Modern Biopsy Forceps,” Journal of Pediatric Surgery, Vol. 44, No. 2, 2009, pp. 395-398. http://dx.doi.org/10.1007/s00383-006-1714-8
 B. I. Rees, A. Azmy, M. Nigam and B. D. Lake, “Complications of Rectal Suction Biopsy,” Journal of Pediatric Surgery, Vol. 18, No. 3, 1983, pp. 273-275. http://dx.doi.org/10.1016/S0022-3468(83) 80098-0
 A. Pini-Prato, C. Carlini, F. Pesce, V. Jasonni and P. Seymandi, “Massive Bleeding after Rectal Suction Biopsy: Uncommon and Unexpected Delayed Onset,” World Journal of Pediatrics, Vol. 7, No. 1, 2011, pp. 83-85. http://dx.doi.org/10.1007/s12519-011-0251-2
 R. Core Team “R: A Language and Environment for Statistical Computing,” R Foundation for Statistical Computing, Vienna, 2013. http://www.R-project.org/