Have you ever received radiotherapy to your head or neck for a tumor:Hx:Pt:^Patient:Ord:PhenX
have you ever received radiotherapy to your head or neck for a tumor:hx:pt:^patient:ord:phenx
Have you ever received radiotherapy to your head or neck for a tumor:History:To identify measures at a point in time:^Patient:Ordinal:PhenX
have you ever received radiotherapy to your head or neck for a tumor:history:to identify measures at a point in time:^patient:ordinal:phenx