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.KC.; Cleary,M.L.; Delsol,G.; De Wolf-Peeters,C.; Falini,B.; Gatter,K.C.; Grogan,T.M.; Isaacson,P.G.; et al. (Blood, 1994)