title: Primum Non Nocere: Of Course! But How?
authors.affiliation: Akershus University Hospital, Lørenskog, Norway jan.oldenburg@medisin.uio.no.
authors.forename: Jan
authors.initials: J
authors.lastname: Oldenburg
authors.affiliation: Erasmus University Medical Center and Cancer Institute, Rotterdam, the Netherlands.
authors.forename: Ronald
authors.initials: R
authors.lastname: de Wit
mesh_terms: D006801:Humans; D008297:Male; D018239:Seminoma / Q000175:diagnosis*; D013736:Testicular Neoplasms / Q000175:diagnosis*