“…Among older patients with HL, it has been repeatedly demonstrated that the survival data in populationbased studies are poorer than those from clinical trials (Kennedy et al, 1985;Appleton et al, 1995;Clarke et al, 2001;Proctor et al, 2002;Jarrett et al, 2005). This effect is likely to be due, at least in part, to the exclusion of frailer elderly individuals from clinical NLPHD (n=7) cHL (n=48) NLPHD ( (Hudson et al, 1993(Hudson et al, , 2004Hutchinson et al, 1998;Friedmann et al, 2002). This may be another explanation of the differences between the present investigation and that of Yung co-workers; most of the patients in the latter study were registered at the time of recruitment to clinical trials.…”