Efficacy and safety of Cheonwangbosim-dan (Tian Wang Bu Xin Dan) for treatment of mild cognitive impairment: A randomized placebo-controlled pilot trial. - Kim, Jae-Hong; Kim, Ae-Ran; Seo, Bok-Nam; Park, Gwang-Cheon; Lee, Jeong-Soon (PLoS ONE, 2025)