Rooprai, R., N. Bhat, R. Sainani, and M. M. Mayabhate. “Prevalence of Functional Constipation and Constipation-Predominant Irritable Bowel Syndrome in Indian Patients With Constipation”. International Journal of Basic & Clinical Pharmacology, vol. 6, no. 2, Jan. 2017, pp. 275-8, doi:10.18203/2319-2003.ijbcp20170044.