Monte Carlo characterization and benchmarking of extended range REM meters for its application in shielding and radiation area monitoring in Compact Proton Therapy Centers (CPTC) - García-Fernández G; Cevallos-Robalino L; García-Baonza R; Gallego E; Vega-Carrillo H; Guzman-García K; Lorente A; Ibáñez S (Applied Radiation And Isotopes, 2019)