Prefrontal white matter impairment in substance users depends upon the catechol-o-methyl transferase (COMT) val158met polymorphism. - Xiaochu Zhang; Mary R. Lee; Betty Jo Salmeron; Dan J. Stein; L. Elliot Hong; Xiujuan Geng; Thomas J. Ross; Nan Li; Colin Hodgkinson; Pei-Hong Shen; Yihong Yang; David Goldman; et al. (NeuroImage, 2013)