Acupuncture for dry eye: a multicentrerandomised controlled trial with activecomparison intervention (artificial tear drop)using a mixed method approach protocol. - Tae-Hun Kim; Jung Won Kang; Kun Hyung Kim; Kyung-Won Kang; Mi-Suk Shin; So-Young Jung; Ae-Ran Kim; Hee-Jung Jung; Seung-Deok Lee; Jin-Bong Choi; Sun-Mi Choi (Trials, 2010)