Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Rust, Kristina Y; Wilkens, Heinrike; Kaiser, Ralf; Bregel, Dietmar; Wilske, Jochen; Kraemer, Thomas (2012). Detection and validated quantification of the phosphodiesterase type 5 inhibitors sildenafil, vardenafil, tadalafil, and 2 of their metabolites in human blood plasma by LC-MS/MS-application to forensic and therapeutic drug monitoring cases. Therapeutic drug monitoring, 34(6):729-735.