title: Reply to H.J.A. Adams et al, E.A. Hawkes et al, and C.F. Hess et al.
authors.affiliation: Peter Borchmann and Andreas Engert, University Hospital of Cologne and University of Cologne, Cologne, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Borchmann
authors.affiliation: Peter Borchmann and Andreas Engert, University Hospital of Cologne and University of Cologne, Cologne, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Engert
mesh_terms: D002648:Child; D006689:Hodgkin Disease; D006801:Humans; D016017:Odds Ratio; D018570:Risk Assessment