A novel model of drug cue-induced behaviours in rhesus macaque subjected to chronic ketamine exposure.

To the Editor, Non-human primate(NHP)models are advantageous for mimicking human addic-tion with high behavioural validity.1 However,current NHP drug addiction models(eg,self-administration)often require a comprehen-sive behavioural training paradigm,relatively expensive apparatus and invasive surgical procedures.