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"Variable Name","Variable ID","Variable Description",Version,"dbGaP Mapping" PX740904_Selfreported_Locationof_Purchase_Ecigarette,PX740904020000,"[Do/Did] you usually buy [ECIGFILL] [and e-liquid]…",0,https://www.phenxtoolkit.org/protocols/view/740904 PX740904_Selfreported_Locationof_Vendor_Ecigarette,PX740904030100,"Where [do/did] you buy your [ECIGFILL] [and e-liquid] most of the time?",0,https://www.phenxtoolkit.org/protocols/view/740904 PX740904_Selfreported_Locationof_Vendor_Ecigarette_OtherVendor,PX740904030202,"Where [do/did] you buy your [ECIGFILL] [and e-liquid] most of the time?",0,https://www.phenxtoolkit.org/protocols/view/740904 PX740904_Selfreported_Locationof_Vendor_Ecigarette_OtherVendorEncoded,PX740904030201,"Where [do/did] you buy your [ECIGFILL] [and e-liquid] most of the time?",0,https://www.phenxtoolkit.org/protocols/view/740904 PX740904_Selfreported_Methodof_Purchase_Ecigarette,PX740904010000,"How [do/did] you usually buy [ECIGFILL] [and e-liquid] for yourself? Is it…",0,https://www.phenxtoolkit.org/protocols/view/740904