1. Medical Technology Department, Health Sciences Faculty, Tarapaca University, Arica, Chile
2. Radiology Department, Faculty of Medicine, Complutense University and IdIS, San Carlos Hospital, 28040 Madrid, Spain
3. Argentine Society for Radiological Protection, Buenos Aires, Argentina; External consultant World Health Organization (WHO)
4. International Atomic Energy Agency, Vienna, Austria
5. Luis Calvo Mackenna’s Hospital, Antonio Varas 360, Santiago, Chile
6. Radiology Service, Álvarez-Buylla Hospital, Mieres, Asturias, Spain; External consultant World Health Organization (WHO).