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APA Citation
Bertz, J. W., Epstein, D. H., Rea, M., Figueiro, M. G., Ward, G., & Preston, K. L. (2017). measuring circadian entrainment during outpatient opioid agonist maintenance. Drug and alcohol dependence, 171, e20–. http://access.bl.uk/ark:/81055/vdc_100040372626.0x00005c