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"Variable Name","Variable ID","Variable Description",Version,"dbGaP Mapping" PX030701_First_Cigarette_Smoking_Age,PX030701010000,"How old were you the first time you smoked part or all of a cigarette?",0,https://www.phenxtoolkit.org/protocols/view/30701 PX030701_First_Cigarette_Smoking_Age_Coded,PX030701010100,"How old were you the first time you smoked part or all of a cigarette?",0,https://www.phenxtoolkit.org/protocols/view/30701 PX030701_First_Cigarette_Smoking_Everyday_Age,PX030701020000,"How old were you when you first started smoking cigarettes every day?",0,https://www.phenxtoolkit.org/protocols/view/30701 PX030701_First_Cigarette_Smoking_Everyday_Age_Coded,PX030701020100,"How old were you when you first started smoking cigarettes every day?",0,https://www.phenxtoolkit.org/protocols/view/30701