Retrospective Cohort Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Jan 28, 2015; 21(4): 1173-1181
Published online Jan 28, 2015. doi: 10.3748/wjg.v21.i4.1173
Figure 1
Figure 1 Flow chart of study population. No treatment during the follow-up period due to precedent operation, patient’s condition, patients’ refusal, etc. DM: Diabetes mellitus; HTN: Hypertension.