Chae, Y., Chang, D.-S., Lee, S.-H., Jung, W.-M., Lee, I.-S., Jackson, S., Kong, J., Lee, H., Park, H.-J., Lee, H., & Wallraven,
C. (2013). Inserting Needles Into the Body: A Meta-Analysis of Brain Activity Associated
With Acupuncture Needle Stimulation. Journal of Pain, 14(3),
215-222. doi:10.1016/j.jpain.2012.11.011.