Is there a Nordic solution for the 'proton-problem'?

Is there a Nordic solution for the 'proton-problem'? Acta Oncol. 2020 Aug 27;:1-2 Authors: Bergfeldt K, Nystrom H, Witt Nystrom P, Høyer M PMID: 32852249 [PubMed - as supplied by publisher]
Source: Acta Oncologica - Category: Cancer & Oncology Authors: Tags: Acta Oncol Source Type: research