TY - JOUR A1 - Khuder, S.A. A1 - Dayal, H.H. A1 - Mutgi, A.B. T1 - Age at smoking onset and its effect on smoking cessation Y1 - 1999 DO - 10.1016/S0306-4603(98)00113-0 JF - Addictive Behaviors VL - 24 IS - 5 ER -