<qa>  What is the name of the study protocol and consent form approved by the Institutional Review Board?Setting: Ecuadorian Institute of Digestive Diseases IECED, OmniHospital Academic Tertiary Center. We will include patients from October 2015 to March 2016. Patients will be recruited from the gastroenterology unit IECED. The study protocol and consent form has been approved by the Institutional Review Board IRB and will be conducted according to the declaration of Helsinki. Patients will sign an informed consent and answer a questionnaire that includes constitutional data sex, age, comorbid medical condition, medication. Patients in IBS group will be classified according to the symptoms as diarrhea predominant IBS-D, constipation predominant IBS-C or mixed type IBS-M. Endoscopic findings will be recorded in a database. 