A revised European-American classification of lymphoid neoplasms: a proposal from the International Lymphoma Study Group. - Harris,N.L.; Jaffe,E.S.; Stein,H.; Banks,P.M.; Chan,J.K.; Cleary,M.L.; Delsol,G.; De Wolf-Peeters,C.; Falini,B.; Gatter,K.C. (Blood, 1994)