Estonia's Biggest Medical Mistake?

https://www.err.ee/1609596419/surmaga-loppenud-tusistused-eesti-suurim-raviviga-voi-paratamatus An internal document leaked from PERH shows that serious complications arose for patients following the implementation of a new radiotherapy protocol, resulting in multiple fatalities. The hospital claims that this is not a medical mistake, but a regrettable yet unavoidable side effect. Three months ago, a file leaked from the North Estonia Medical Centre (PERH) made its way to "Pealtnägija". It lists the names of 27 men who developed severe complications after prostate radiotherapy between 2016 and 2018, with some succumbing to their conditions. What has your experience been with reporting medical errors? What improvements could be made?