Poor permeability of morphine 3-glucuronide and morphine 6-glucuronide through the blood-brain barrier in the rat.Ulrich Bickel, K. D. Voigt, Young‐Sook Kang et al.|Journal of Pharmacology and Experimental Therapeutics|1996Cited by 128
Blood-brain barrier permeability to morphine-6-glucuronide is markedly reduced compared with morphine.Dafang Wu, William M. Pardridge, Young‐Sook Kang et al.|PubMed|1997Cited by 120
In vivo demonstration of subcellular localization of anti-transferrin receptor monoclonal antibody-colloidal gold conjugate in brain capillary endothelium.Ulrich Bickel, William M. Pardridge, T. Yoshikawa et al.|Journal of Histochemistry & Cytochemistry|1994Cited by 103