9 ▁to ▁ 2 0 1 2 . ▁ ▁Mc L ellan ▁received ▁his ▁B . A . ▁from ▁Col gate ▁University ▁and ▁his ▁M . S . ▁and ▁Ph . D . ▁from ▁Bry n ▁M aw r ▁College . ▁He ▁received ▁post grad uate ▁training ▁in ▁psych ology ▁at ▁Oxford ▁University . ▁ ▁He ▁has ▁since ▁worked ▁for ▁the ▁V eter ans ▁Administration ▁Medical ▁Center ▁in ▁Philadelphia ▁and ▁the ▁University ▁of ▁Pennsylvania . ▁ ▁Mc L ellan ▁was ▁the ▁principal ▁developer ▁of ▁the ▁Add iction ▁Sever ity ▁Index ▁( AS I ) ▁and ▁the ▁Tre at ment ▁Services ▁Review ▁( TS R ), ▁widely ▁used ▁subst ance ▁ab use ▁instruments . ▁ ▁He ▁has ▁served ▁as ▁an ▁advis er ▁to ▁many ▁government ▁and ▁non pro fit ▁scientific ▁organizations , ▁including ▁the ▁Office ▁of ▁National ▁D rug ▁Control ▁Policy , ▁the ▁National ▁Pract ice ▁Labor atory ▁of ▁the ▁American ▁Psych iat ric ▁Association , ▁the ▁Swiss ▁National ▁Science ▁Foundation , ▁the ▁World ▁Health ▁Organ ization , ▁the ▁Greek ▁government ▁and ▁Public ▁Health ▁England . ▁ ▁Mc L ellan ▁served ▁as ▁the ▁Deput y ▁Director ▁of ▁the ▁Office ▁of ▁National ▁D rug ▁Control ▁Policy ▁under ▁the ▁Ob ama ▁administration . ▁ ▁Among ▁Mc L ellan ' s ▁many ▁hon ors ▁and ▁awards ▁are ▁the ▁Life ▁Ach iev ement ▁Award ▁of ▁the ▁American ▁Society ▁of ▁Add iction ▁Medicine ▁in ▁ 2 0 0 3 ▁and ▁the ▁ 2 0 0 2 ▁award ▁for ▁Dist ingu ished ▁Cont ribution ▁in ▁Add iction ▁Medicine ▁from ▁the