Prognostic significance of the Ki-67-associated proliferative antigen in aggressive non-Hodgkin's lymphomas: a prospective Southwest Oncology Group trial - TP Miller; TM Grogan; Steve Dahlberg; CM Spier; RM Braziel; PM Banks; Kathryn Foucar; CR Kjeldsberg; Nicolas Lévy; BN Nathwani (1994)