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APA Citation
Midgley, L. S., Murphy, S., Moore, G., Hewitt, G., & White, J. (2018). multilevel population-based cross-sectional study examining school substance-misuse policy and the use of cannabis, mephedrone and novel psychoactive substances among students aged 11–16 years in schools in Wales. BMJ open, 8(6), . http://access.bl.uk/ark:/81055/vdc_100144717267.0x000004