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Comment
. 1991 May 25;302(6787):1276-7.
doi: 10.1136/bmj.302.6787.1276-c.

What is a normal upper gastrointestinal tract?

A P Walker, B F Walker, I Segal
Comment

What is a normal upper gastrointestinal tract?

A P Walker et al. BMJ. .
No abstract available

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References

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    1. BMJ. 1991 Mar 30;302(6779):742 - PubMed
    1. Lancet. 1981 May 16;1(8229):1081-3 - PubMed
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