Title: Lead poisoning as a differential diagnosis in pediatric patients with chronic abdominal
pain: A case-control study in Tehran#Iran
Version: 3 Date: 12 Oct 2023
Reviewer's report:
Dear authors,
The manuscript is valuable but there are some grammatical and punctuation errors.
It needs to revise.
I think the authors should extend discussion section.
The sample size is small.
How you determined the sample size?
Please explain how you selected the case and control patients?
How many patients were eligible or excluded during study?
You should explain all excluded cases by simple algorithm.
What is the lowest  and highest BLL in each groups?
Are there BLL  atomic absorption test in your hospital?
How you stored  Blood tube at -80oC?
Title: Lead poisoning as a differential diagnosis in pediatric patients with chronic abdominal
pain: A case-control study in Tehran#Iran
Version: 3 Date: 12 Oct 2023
Reviewer's report:
Dear authors,
The manuscript is valuable but there are some grammatical and punctuation errors.
It needs to revise.
I think the authors should extend discussion section.
The sample size is small.
How you determined the sample size?
Please explain how you selected the case and control patients?
How many patients were eligible or excluded during study?
You should explain all excluded cases by simple algorithm.
What is the lowest  and highest BLL in each groups?
Are there BLL  atomic absorption test in your hospital?
How you stored  Blood tube at -80oC?
Please review this paper.
user
Title: Lead poisoning as a differential diagnosis in pediatric patients with chronic abdominal
pain: A case-control study in Tehran#Iran
Version: 3 Date: 12 Oct 2023
Reviewer's report:
Dear authors,
The manuscript is valuable but there are some grammatical and punctuation errors.
It needs to revise.
I think the authors should extend discussion section.
The sample size is small.
How you determined the sample size?
Please explain how you selected the case and control patients?
How many patients were eligible or excluded during study?
You should explain all excluded cases by simple algorithm.
What is the lowest  and highest BLL in each groups?
Are there BLL  atomic absorption test in your hospital?
How you stored  Blood tube at -80oC?
assistant