Electroacupuncture for insomnia disorder: study protocol for a randomized controlled trial. - Sung-Phil Kim; Joo-Hee Kim; Bo-Kyung Kim; Hyeong-Jun Kim; In Chul Jung; Jung Hyo Cho; Jung-Eun Kim; Mi-Kyung Kim; O-Jin Kwon; Ae-Ran Kim; Hyo-Ju Park; Bok-Nam Seo; et al. (Trials, 2017)