Turfus, S.C., Chu, M., Gerostamoulos, D. and Drummer, O.H. (2014) An assessment of the stability of MDMA, methamphetamine and THC in oral fluid, Australian Journal of Forensic Sciences.
http://dx.doi.org/10.1080/00450618.2013.879204
When the above article was first published online, the authors’ affiliations were incorrect. This has now been amended.