Changes

*{| class="wikitable"|-| Description| https://www.iaea.org/resources/rpop*|-| Description*| https://www.radiologyinfo.org*|}

*{| class="wikitable"|-| American Society for Radiation Oncology: | https://www.Astro.org*|-*| European Society for Radiotherapy and Oncology: | https://www.estro.org*|-*| International Atomic Energy Agency: | https://www.iaea.org/resources/rpop|}