Author:
MAYBERRY JOHN F.,ATKINSON MICHAEL
Subject
Gastroenterology,Hepatology
Reference14 articles.
1. 3. J.L. Fleiss, Statistical Methods for Rates and Proportions , 2nd ed. Wiley, New York. 1981 ; 14 , 15 , 15 , 15 .
2. Achalasia in the City of Cardiff from 1926 to 1977
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