Tyrer, P., Tyrer, H., Cooper, S., Barrett, B., Kings, S., Lazarevic, V., Bransby-Adams, K., Whittamore, K. H., Walker, G. M., McNulty, A., Donaldson, E., Midgley, L., McCoy, S., Evered, R., Yang, M., Guo, B., Lisseman-Stones, Y., Doukani, A., Mulder, R., Morriss, R. K., & Crawford, M. (2015). Cognitive behaviour therapy for non-cardiac pain in the chest (COPIC): a multicentre randomized controlled trial with economic evaluation. BMC Psychology, 3(41), https://doi.org/10.1186/s40359-015-0099-7