Aristotle University of Thessaloniki
Greece
University Hospitals Bristol and Weston NHS Foundation Trust
UK
Zealend University Hospital Dept of Oncology
Denmark
Harvard Medical School
USA
UKER, FAU Erlangen-Nürnberg
Germany
Ningxia Medical University
China
University of Mainz
Germany
Radio-oncologist, Mexican Institute of Social Security
Mexico
Pusan National University
South Korea