Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Peter Cummings and Barbara McKnight,Analysis of Matched Cohort Data,The Stata Journal: Promoting communications on statistics and Stata,1536-867X,SAGE Publications,2004-08,4,3,274-281,https://cir.nii.ac.jp/crid/1363670318548738048,https://doi.org/10.1177/1536867x0400400305