Prognostic value of pre-treatment neutrophil-lymphocyte and platelet-lymphocyte ratio in diffuse large B-cell lymphoma: a single-center experience G. Dagci; M. Guzel Mastanzade; M. Ozbalak; D. Ozluk; T. Tiryaki; I. Yonal Hindilerden; M. Yenerel; M. Nalcaci; S. Kalayoglu Besisik;