Additional file 1: of Evaluation of reliability and validity of the General Practice Physical Activity Questionnaire (GPPAQ) in 60–74 year old primary care patients AhmadShaleen HarrisTess LimbElizabeth KerrySally VictorChristina EkelundUlf IliffeSteve WhincupPeter BeightonCarole UssherMichael CookDerek 2015 General practice physical activity questionnaire. (JPEG 87 kb)