Small hypoxia-primed mesenchymal stem cells attenuate graft-versus-host disease YongHwan Kim, Hye Jin Jin, Jinbeom Heo, Hyein Ju, Hye-Yeon Lee, Sujin Kim, Seungun Lee, Jisun Lim, Sang Young Jeong, JiHye Kwon, Miyeon Kim, Soo Jin Choi, Wonil Oh, Yoon Sun Yang, Hyun Ho Hwang, Hwan Yeul Yu, Chae-Min Ryu, Hong Bae Jeon & Dong-Myung Shin, 2018