1. http://www.gastro.org/userassets/Documents/02_Clinical_Practice/medical_position_statments/chronic_diarrhea_tr.pdf
2. http://www.uptodate.com/patients/content/topic.do?topicKey=digestiv/4974
3. www.cdc.gov/ncidod/dpd/parasites/diarrhea/factsht_chronic_diarrhea.htm
4. www.cdc.gov/ncidod/dpd/parasiticpathways/diarrhea.htm
5. Drug-induced diarrhea;Abraham;Curr Gastroenterol Rep,2007