Original Research Published on 22 Jun 2017 Serum Vitamin A Levels May Affect the Severity of Ocular Graft-versus-Host Disease in Hematology Jiefeng TongRenjian HuYingying ZhaoYang XuXiaoying ZhaoXiuming Jin Frontiers in Medicine doi 10.3389/fmed.2017.00067 4,267 views 10 citations