The complex social, cultural and psychological drivers of the 'chemsex' experiences of men who have sex with men: a systematic review and conceptual thematic synthesis of qualitative studies.

Introduction: Chemsex' is the sexualised use of drugs among men who have sex with men (MSM). Past systematic reviews have primarily focussed on quantitative research exploring the key characteristics and health consequences of chemsex. However, a large body of qualitative literature exists, drawing on different theoretical frameworks.

The CORE service improvement programme for mental health crisis resolution teams: results from a cluster-randomised trial.

Background: Crisis resolution teams (CRTs) offer brief, intensive home treatment for people experiencing mental health crisis. CRT implementation is highly variable; positive trial outcomes have not been reproduced in scaled-up CRT care.

Aims: To evaluate a 1-year programme to improve CRTs' model fidelity in a non-masked, cluster-randomised trial (part of the Crisis team Optimisation and RElapse prevention (CORE) research programme, trial registration number: ISRCTN47185233).