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Is coffee a colonic stimulant?
Rao SS, Welcher K, Zimmerman B, Stumbo P. Rao SS, et al. Among authors: welcher k. Eur J Gastroenterol Hepatol. 1998 Feb;10(2):113-8. doi: 10.1097/00042737-199802000-00003. Eur J Gastroenterol Hepatol. 1998. PMID: 9581985 Clinical Trial.
FECOM: a new artificial stool for evaluating defecation.
Pelsang RE, Rao SS, Welcher K. Pelsang RE, et al. Among authors: welcher k. Am J Gastroenterol. 1999 Jan;94(1):183-6. doi: 10.1111/j.1572-0241.1999.00793.x. Am J Gastroenterol. 1999. PMID: 9934752 Clinical Trial.