%0 Letter %T Letter regarding "Consensus guide on CT-based prediction of stopping-power ratio using a Hounsfield look-up table for proton therapy". %A Poludniowski G %A Zimmerman J %J Radiother Oncol %V 190 %N 0 %D 2024 Jan 21 %M 37871750 %F 6.901 %R 10.1016/j.radonc.2023.109962