Investigation of the COMT Val158Met variant association with age of onset of psychosis, adjusting for cannabis use. Issue 9 (27th September 2018) - Lodhi, Rohit J.; Wang, Yabing; Rossolatos, David; MacIntyre, Georgina; Bowker, Alexandra; Crocker, Candice; Ren, Hongyan; Dimitrijevic, Aleksandra; Bugbee, Darren A.; Loverock, Alexandra; Majeau, Brett; Sivapalan, Sudhakar; et al.