Expert Opinion on Drug Delivery September 2005, Vol. 2, No. 5 : Pages 891-908 Ophthalmic drug delivery considerations at the cellular level: drug- metabolising enzymes and transporters Mayssa Attar, Jie Shen, Kah-Hiing John Ling and Diane Tang-Liu (doi: 10.1517/17425247.2.5.891) Read More: http://informahealthcare.com/doi/pdf/10.1517/17425247.2.5.891 Thanks a lot!