Objectives: To examine whether young peoples' risk of cannabis, mephedrone and novel psychoactive substances (NPS) use is associated with school substance-misuse policy.
Design: A cross-sectional survey of secondary school students combined with a School Environment Questionnaire and independently coded school substance-misuse policies (2015/6).
Setting: 66 secondary schools in Wales.
Background: Most patients with chest pain have nothing wrong with their cardiac function. Psychological forms of treatment for this condition are more likely to be successful than others.
Methods/design: A two-arm parallel controlled randomized trial of standard care versus a modified form of cognitive behaviour therapy for chest pain (CBT-CP) in patients who have attended emergency hospital services.