Kim K, Lee M, Hahm S.  Effects of Postural Control Training Using a Visual Blind Board on Head Control, Trunk Control, and the Sitting Abilities of Children with Moderate to Severe Cerebral Palsy: A Pilot Study.  KSPM 2022;17:31-40.  https://doi.org/10.13066/kspm.2022.17.3.31