1. Borum ML. Constipation: evaluation and management. Prim Care. 2001;28:577–90.
2. Locke GR 3rd, Pemberton JH, Phillips SF. AGA technical review on constipation. American Gastroenterological Association. Gastroenterology. 2000;119:1766–78.
3. Locke GR 3rd, Pemberton JH, Phillips SF. American Gastroenterological Association Medical Position Statement: guidelines on constipation. Gastroenterology. 2000;119:1761–6.
4. Elliot DL, Watts WJ, Girard DE. Constipation. Mechanisms and management of a common clinical problem. Postgrad Med. 1983;74:143–9.
5. Wald A. Pathophysiology, diagnosis and current management of chronic constipation. Nat Clin Pract Gastroenterol Hepatol. 2006;3:90–100.
6. Harari D, Gurwitz JH, Avorn J, Bohn R, Minaker KL. How do older persons define constipation? Implications for therapeutic management. J Gen Intern Med. 1997;12:63–6.
7. Shafik A. Constipation. Pathogenesis and management. Drugs. 1993;45:528–40.
8. Andromanakos N, Skandalakis P, Troupis T, Filippou D. Constipation of anorectal outlet obstruction: Pathophysiology, evaluation and management. J Gastroenterol Hepatol. 2006;21:638–46.
9. Crowell MD. Pathogenesis of slow transit and pelvic floor dysfunction: from bench to bedside. Rev Gastroenterol Disord. 2004;4:S17–27.
10. Rao SS, Patel RS. How useful are tests of anorectal function in the management of defecation disorders? Am J Gastroneterol. 1997;92:469–75.
11. Shafik A. Idiopathic oligofecorrhea: a clinicopathologic entity— pathogenesis and treatment. Digestion. 1991;48:51–8.
12. Camilleri M, Thompson WG, Fleshman JW, Pemberton JH. Clinical management of intractable constipation. Ann Intern Med. 1994;121:520–8.
13. Gershon MD. Nerves, reflexes, and the enteric nervous system: pathogenesis of the irritable bowel syndrome. J Clin Gastroenterol. 2005;39:S184–93.
14. Sabri M, Barksdale E, Di Lorenzo C. Constipation and lack of colonic interstitial cells of Cajal. Dig Dis Sci. 2003;48:849–53.
15. Kobayashi H, Li Z, Yamataka A, Lane GJ, Yokota H, Watanabe A, et al. Acetylcholinesterase distribution and refractory constipation - a new criterion for diagnosis and management. Pediatr Surg Int. 2002;18:349–53.
16. Chatterjee S, Park S, Low K, Kong Y, Pimentel M. The degree of breath methane production in IBS correlates with the severity of constipation. Am J Gastroenterol. 2007;102:837–41.
17. Rao SS, Tuteja AK, Vellema T, Kempf J, Stessman M. Dyssynergic defecation: demographics, symptoms, stool patterns, and quality of life. J Clin Gastroenterol. 2004;38:680–5.
18. El-Salhy M. Chronic idiopathic slow transit constipation: pathophysiology and management. Colorectal Dis. 2003;5:288– 96.
19. Ghoshal UC, Gupta D, Kumar A, Misra A. Colonic transit time by radio-opaque markers to investigate refractory constipation: Validation of a new protocol for population with rapid gut transit. Indian J Gastroenterol. 2006;25 :A2.
20. Fleshman JW, Dreznik Z, Cohen E, Fry RD, Kodner IJ. Balloon expulsion test facilitates diagnosis of pelvic floor outlet obstruction due to nonrelaxing puborectalis muscle. Dis Colon Rectum. 1992;35:1019–25.
21. Lestar B, Penninckx FM, Kerremans RP. Defecometry. A new method for determining the parameters of rectal evacuation. Dis Colon Rectum 1989;32:197–201.
22. Minguez M, Herreros B, Sanchiz V, Hernandez V, Almela P, Anon R, et al. Predictive value of the balloon expulsion test for excluding the diagnosis of pelvic floor dyssynergia in constipation. Gastroenterology 2004;126:57–62.
23. Surrenti E, Rath DM, Pemberton JH, Camilleri M. Audit of constipation in a tertiary referral gastroenterology practice. Am J Gastroenterol. 1995;90:1471–5.
24. Meshkinpour H, Selod S, Movahedi H, Nami N, James N, Wilson A. Effects of regular exercise in management of chronic idiopathic constipation. Dig Dis Sci. 1998;43:2379–83.
25. Thorpe DM. Management of opioid-induced constipation. Curr Pain Headache Rep. 2001;5:237–40. 26. Morgan C. Constipation during pregnancy. Fiber and fluid are keys to self-management. Adv Nurse Pract. 2001;9:57–8.
26. Morgan C. Constipation during pregnancy. Fiber and fluid are keys to self-management. Adv Nurse Pract. 2001;9:57–8.
27. Schneider GT, Barraza DF. Management of constipation during pregnancy use of dioctyl sodium sulfosuccinate in 28 patients. J La State Med Soc. 1957;109:2535.
28. Schoenfeld RC. Management of postpartum constipation with dioctyl sodium succinate. Am J Obstet Gynecol. 1957;74:1114–5.
29. Doughty DB. When fiber is not enough: current thinking on constipation management. Ostomy Wound Manage. 2002;48:30– 41.
30. Kumar A, Kumar N, Vij JC, Sarin SK, Anand BS. Optimum dosage of ispaghula husk in patients with irritable bowel syndrome: correlation of symptom relief with whole gut transit time and stool weight. Gut. 1987;28:150–5.
31. Bassotti G, Chistolini F, Sietchiping-Nzepa F, de Roberto G, Morelli A, Chiarioni G. Biofeedback for pelvic floor dysfunction in constipation. BMJ. 2004;328:393–6.
32. Battaglia E, Serra AM, Buonafede G, Dughera L, Chistolini F, Morelli A, et al. Long-term study on the effects of visual biofeedback and muscle training as a therapeutic modality in pelvic floor dyssynergia and slow-transit constipation. Dis Colon Rectum. 2004;47:90–5.
33. Bleijenberg G, Kuijpers HC. Biofeedback treatment of constipation: a comparison of two methods. Am J Gastroenterol. 1994;89:1021– 6.
34. Chiarioni G, de Roberto G, Mazzocchi A, Morelli A, Bassotti G. Manometric assessment of idiopathic megarectum in constipated children. World J Gastroenterol. 2005;11:6027–30.
35. Chiarioni G, Whitehead WE, Pezza V, Morelli A, Bassotti G. Biofeedback is superior to laxatives for normal transit constipation due to pelvic floor dyssynergia. Gastroenterology. 2006;130:657– 64.
36. Chiotakakou-Faliakou E, Kamm MA, Roy AJ, Storrie JB, Turner IC. Biofeedback provides long-term benefit for patients with intractable, slow and normal transit constipation. Gut. 1998;42:517– 21.
37. Heymen S, Scarlett Y, Jones K, Ringel Y, Drossman D, Whitehead WE. Randomized, controlled trial shows biofeedback to be superior to alternative treatments for patients with pelvic floor dyssynergiatype constipation. Dis Colon Rectum. 2007;50:428–41.
38. Nehra V, Bruce BK, Rath-Harvey DM, Pemberton JH, Camilleri M. Psychological disorders in patients with evacuation disorders and constipation in a tertiary practice. Am J Gastroenterol. 2000;95:1755–8.
39. McKee RF, McEnroe L, Anderson JH, Finlay IG. Identification of patients likely to benefit from biofeedback for outlet obstruction constipation. Br J Surg. 1999;86:355–9.
40. Borowitz SM, Ritterband L. Using the Internet to teach parents and children about constipation and encopresis. Med Inform Internet Med. 2001;26:283–95.
41. Eckardt VF. Is biofeedback therapy an effective treatment for patients with constipation? Nat Clin Pract Gastroenterol Hepatol. 2006;3:198–9.
42. Barnes PR, Hawley PR, Preston DM, Lennard-Jones JE. Experience of posterior division of the puborectalis muscle in the management of chronic constipation. Br J Surg. 1985;72:475–7.
43. Fleshman JW, Fry RD, Kodner IJ. The surgical management of constipation. Baillieres Clin Gastroenterol. 1992;6:145–62.
44. Kamm MA, Hawley PR, Lennard-Jones JE. Lateral division of the puborectalis muscle in the management of severe constipation. Br J Surg. 1988;75:661–3.
45. Platell C. The surgical management of chronic constipation. Dis Colon Rectum. 2001;44:1898–9.
46. Rawat DJ, Haddad M, Geoghegan N, Clarke S, Fell JM. Percutaneous endoscopic colostomy of the left colon: a new technique for management of intractable constipation in children. Gastrointest Endosc. 2004;60:39–43.