Prognostic value of positron emission tomography in the evaluation of post-treatment residual mass in patients with Hodgkin's disease and non-Hodgkin's lymphoma. - Naumann,R.; Vaić,A.; Beuthien-Baumann,B.; Bredow,J.; Kropp,J.; Kittner,T.; Franke,W.G.; Ehninger,G. (Brit J Haematol, 2001)