1 Department Radiation Oncology (Maastro Clinic), GROW, Maastricht University Medical Center, Maastricht, The Netherlands; Department of Experimental Radiation Oncology, Leuven University, Leuven, Belgium. Electronic address: dirk.deruysscher@maastro.nl.
2 Department of Pulmonology, GROW, Maastricht University Medical Center, Maastricht, The Netherlands.
3 Department of Radiotherapy, GROW, Maastricht University Medical Center, Maastricht, The Netherlands.
4 Department of Cardiology, Maastricht University Medical Center, CARIM, Maastricht, The Netherlands; Department of Cardiovascular Sciences, Leuven University, Leuven, Belgium; Netherlands Heart Institute, Utrecht, The Netherlands.