Review for 10.1186/s12876-020-01506-6 (2020)

Reviewer’s report
Title: 
Vertical distance from navel as a risk factor for bowel obstruction
associated with feeding jejunostomy after esophagectomy : a retrospective
cohort study
Version: 
1 
Date: 
24 Jul 2020
Reviewer's report:
Authors need to provide following clarifications and add the limitations 
1. Why a CT abdomen was performed within one month after surgery in these 70
patients?
2. Accuracy of the determination of navel after midline periumbilical incision
given in the latter part of the study
3. need to add the limitation that vertical distance may be a risk factor in patients
who underwent button jejunostomy as witzel broad based feeding jejunostomy is
the commonly used technique 
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