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Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association|September 1, 1991
Cutaneous effects of transdermal levonorgestrelD R Friend, S J Phillips, J R Hill
Critical Reviews in Therapeutic Drug Carrier Systems|January 1, 1990
Transdermal delivery of contraceptivesD R Friend
Journal of Microencapsulation|October 1, 1992
Polyacrylate resin microcapsules for taste masking of antibioticsD R Friend
Drug Design and Delivery|May 1, 1990
In vitro evaluations of transdermal levonorgestrelP Catz, D R Friend
Journal 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 Friend
Journal of Medicinal Chemistry|January 1, 1985
Drug glycosides: potential prodrugs for colon-specific drug deliveryD R Friend, G W Chang
Pharmaceutical Development and Technology|September 22, 1998
Purified guar galactomannan as an improved pharmaceutical excipientM S Gebert, D R Friend
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