The recurrence patterns of stages I, II and III neuroblastoma: experience with 77 relapsing patients. - Berthold,F.; Hero,B.; Breu,H.; Christiansen,H.; Erttmann,R.; Gnekow,A.; Herrmann,F.; Klingebiel,T.; Lampert,F.; Müller-Weihrich,S.; Weinel,P. (Ann Oncol, 1996)