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"Variable Name","Variable ID","Variable Description",Version,"dbGaP Mapping" PX030903_Smoking_Cessation_Age,PX030903020100,"Earlier the computer recorded that you last smoked part or all of a cigarette [input response to Question 1]. How old were you the last time you smoked part or all of a cigarette?",0,https://www.phenxtoolkit.org/protocols/view/30903 PX030903_Smoking_Cessation_Age_Coded,PX030903020200,"Earlier the computer recorded that you last smoked part or all of a cigarette [input response to Question 1]. How old were you the last time you smoked part or all of a cigarette?",0,https://www.phenxtoolkit.org/protocols/view/30903 PX030903_Smoking_Cessation_Time,PX030903010000,"How long has it been since you last smoked part or all of a cigarette?",0,https://www.phenxtoolkit.org/protocols/view/30903