Abbreviations: CR, complete response; RR, response rate; OS, overall survival; ETCL, enteropathy-type intestinal T-cell lymphoma; PTCL-NOS, peripheral T-cell lymphoma not otherwise specified; NKTCL, NK/T-cell lymphoma; AITL, angioimmunoblastic T-cell lymphoma; ALCL, anaplastic large cell lymphoma; CHOEP, cyclophosphamide, doxorubicin, vincristine, etoposide and prednisone; CHOP-EG CHOP, plus etoposide and gemcitabine; CEOP-B, cyclophosphamide, epirubicin, vincristine, and prednisone; CHOP, cyclophosphamide, doxorubicin, vincristine and prednisone.