TY - JOUR A1 - Flegal, K.M. A1 - Graubard, B.I. A1 - Williamson, D.F. A1 - Gail, M.H. T1 - Impact of smoking and preexisting illness on estimates of the fractions of deaths associated with underweight, overweight, and obesity in the US population Y1 - 2007a DO - 10.1093/aje/kwm152 JF - American Journal of Epidemiology VL - 166 IS - 8 ER -