Chhabra S, Szabo A, Clurman A, McShane K, Waters N, Eastwood D, Samanas L, Fei T, Armijo G, Abedin S, Longo W, Hari P, Hamadani M, Shah NN, Runaas L, Jerkins JH, van den Brink M, Peled JU, Drobyski WR. Mitigation of gastrointestinal graft-<i>versus</i&gt;-host disease with tocilizumab prophylaxis is accompanied by preservation of microbial diversity and attenuation of enterococcal domination. Haematologica 2023;108(1):250-256; https://doi.org/10.3324/haematol.2022.281309.