Bishop, A., Ogollah, R., Bartlam, B., Barlas, P., Holden, M. A., Ismail, K. M., …Foster, N. E. (2016). Evaluating acupuncture and standard care for pregnant women and back pain: the EASE back pilot randomised controlled trial ((ISRCTN49955124). Pilot and Feasibility Studies, 2, Article 72. https://doi.org/10.1186/s40814-016-0107-6