TY - RPRT TI - Drug delivery by genetically engineered cell implants. AU - J A Zwiebel AU - S M Freeman AU - K Newman AU - D Dichek AU - U S Ryan AU - W F Anderson PY - 1991 DO - 10.1111/j.1749-6632.1991.tb27259.x UR - https://pubmed.ncbi.nlm.nih.gov/2006798/ ID - 2006798 ER -