RT Journal Article SR Electronic T1 What is a practical approach to outpatient evaluation of diarrhea in a previously healthy, middle-aged patient? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 104 OP 104 VO 68 IS 2 A1 Achkar, Edgar YR 2001 UL http://www.ccjm.org/content/68/2/104.abstract AB