Authors: Erin L Karschner; W David Darwin; Robert S Goodwin; Stephen Wright; Marilyn A Huestis Journal: Clin Chem Date: 2010-11-15 Impact factor: 8.327
Authors: E L Karschner; W D Darwin; R P McMahon; F Liu; S Wright; R S Goodwin; M A Huestis Journal: Clin Pharmacol Ther Date: 2011-02-02 Impact factor: 6.875