title: In reply to de Ruysscher et al.
authors.affiliation: Department of Radiotherapy, Ghent University Hospital, Gent, Belgium.
authors.forename: Barbara
authors.initials: B
authors.lastname: Vanderstraeten
authors.affiliation: Department of Radiotherapy, Ghent University Hospital, Gent, Belgium.
authors.forename: Wilfried
authors.initials: W
authors.lastname: De Neve
authors.affiliation: Department of Radiotherapy, Ghent University Hospital, Gent, Belgium.
authors.forename: Yolande
authors.initials: Y
authors.lastname: Lievens
authors.affiliation: Department of Radiation Oncology, University Hospital Gasthuisberg, Leuven, Belgium.
authors.forename: Jan
authors.initials: J
authors.lastname: Verstraete
authors.affiliation: Belgian Hadron Therapy Centre Foundation, Brussels, Belgium.
authors.forename: Roger
authors.initials: R
authors.lastname: De Croock
mesh_terms: D000066:Accounting / Q000379:methods*; D002173:Cancer Care Facilities / Q000191:economics*; D063193:Heavy Ion Radiotherapy / Q000191:economics*; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000191:economics*; D018803:Models, Economic; D061766:Proton Therapy / Q000191:economics*