Do you have a twin brother or sister:Find:Pt:^Patient:Ord:Carolina Breast Cancer Study
do you have a twin brother or sister:find:pt:^patient:ord:carolina breast cancer study
Do you have a twin brother or sister:Finding:To identify measures at a point in time:^Patient:Ordinal:Carolina Breast Cancer Study
do you have a twin brother or sister:finding:to identify measures at a point in time:^patient:ordinal:carolina breast cancer study