A. Smirnov et al., “Young Adults’ Trajectories of Ecstasy Use: A Population Based Study,” Addictive Behaviors 38, no. 11 (2013): 2667–2674. Describes a recent study of Ecstasy users in Australia aged 19-23 years over 30 months. Concludes that “Intermediate and high-use trajectory membership was predicted by past Ecstasy consumption (>70 pills) and attendance at electronic/dance music events,” and “high-use trajectory members were unlikely to have used Ecstasy for more than 3 years and tended to report consistently positive subjective effects at baseline.”