TY - GEN AU - Goldstein,P J AU - Abbott,W AU - Paige,W AU - Sobel,I AU - Soto,F TI - Tracking procedures in follow-up studies of drug abusers SN - 0095-2990 PY - 1978///0617 KW - Follow-Up Studies KW - methods KW - Humans KW - Substance-Related Disorders N1 - Publication Type: Journal Article UR - https://doi.org/10.3109/00952997709002744 ER -