Koreth Koreth J J Matsuoka Matsuoka K-I K-I Kim Kim HT HT Interleukin-2 and regulatory T cells in graft-versus-host disease Interleukin-2 and regulatory T cells in graft-versus-host disease N Engl J Med N Engl J Med 2011 2011 365 365 2055 2055 2066 2066 10.1056/NEJMoa1108188 10.1056/NEJMoa1108188 22129252 22129252. Here, IL2 is linked to graft versus host disease.