Review for 10.1186/s12876-020-01443-4 (2020)

Reviewer’ s report
Title: A Retrospective Study on the Association of Gastrointestinal Symptoms in Children with
Low Lactase Activity and Low Activity of Other Disaccharidases
Version: 2Date: 26 Jun 2020
Reviewer's report:
The authors answered the questions and comments previously raised even if many topics should
be extensively investigated in a prospective study
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YesDoes the work include the necessary controls?
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Acceptable
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