RT Journal Article SR Electronic T1 THERAPEUTIC SYSTEMS—PATTERN-SPECIFIC DRUG DELIVERY: CONCEPT AND DEVELOPMENT JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 314 OP 314 VO 30 IS 214 A1 V. W. M. Drury YR 1980 UL http://bjgp.org/content/30/214/314.1.abstract AB