RT Article T1 Adoption study demonstrating two genetic pathways to drug abuse JF Archives of general psychiatry VO 52 IS 1 SP 42 OP 52 A2 Woodworth, George A2 Stewart, Mark A. A2 Yates, William R. A2 Troughton, Ed LA English YR 1995 UL https://krimdok.uni-tuebingen.de/Record/1639407537 K1 Drogenmissbrauch K1 Adoptionsstudie