Zindler, Jaap D.
Schiffelers, Jacqueline
Lambin, Philippe
Hoffmann, Aswin L.
Article History
Received: 14 May 2017
Accepted: 5 January 2018
First Online: 18 January 2018
Conflict of interest
: J.D. Zindler, J. Schiffelers, P. Lambin and A.L. Hoffmann declare that they have no competing interests. MAASTRO Clinic has a research agreement with Varian Medical Systems, Palo Alto, CA, USA.