Electroacupuncture as a complement to usual care for patients with non-acute low back pain after back surgery: a pilot randomised controlled trial - Heo, I., Hwang, M.-S., Hwang, E.-H., Cho, J.-H., Ha, I.-H., Shin, K.-M., Lee, J.-H., Kim, N.-K., Son, D.-W., Shin, B.-C. (BMJ Publishing, 2018)
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