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Drug Design and Delivery|May 1, 1990
In vitro evaluations of transdermal levonorgestrelP Catz, D R FriendContraception|July 1, 1989
Transdermal delivery of levonorgestrel. VII. In vivo studiesD R Friend, P Catz, S PhillipsJournal of Pharmaceutical Sciences|June 1, 1989
Transdermal delivery of levonorgestrel. IV: Evaluation of membranesD R Friend, P Catz, J Heller, et al.Pharmaceutical Research|November 1, 1989
Transdermal delivery of levonorgestrel. V. Preparation of devices and evaluation in vitroD R Friend, P Catz, J Heller, et al.Alimentary Pharmacology & Therapeutics|August 13, 1998
Review article: issues in oral administration of locally acting glucocorticosteroids for treatment of inflammatory bowel diseaseD R FriendCritical Reviews in Therapeutic Drug Carrier Systems|January 1, 1990
Transdermal delivery of contraceptivesD R FriendJournal of Microencapsulation|October 1, 1992
Polyacrylate resin microcapsules for taste masking of antibioticsD R FriendJournal of Medicinal Chemistry|March 1, 1984
A colon-specific drug-delivery system based on drug glycosides and the glycosidases of colonic bacteriaD R Friend, G W ChangJournal of Pharmacokinetics and Biopharmaceutics|August 1, 1995
In vivo pharmacokinetic study for the assessment of poly(L-aspartic acid) as a drug carrier for colon-specific drug deliveryC S Leopold, D R FriendJournal of Medicinal Chemistry|January 1, 1985
Drug glycosides: potential prodrugs for colon-specific drug deliveryD R Friend, G W ChangPageof 4