Norway's UKOM (March 2023) found the knowledge base for hormonal treatment of minors insufficient and recommended puberty blockers, cross-sex hormones and surgery for minors be defined as investigational/experimental treatment requiring research oversight.
research-based knowledge … long-term effects are little known (kunnskapsgrunnlaget 'mangelfullt'; treatment recommended defined as 'utprovende behandling' – investigational treatment)
Norway's UKOM (March 2023) found the knowledge base for hormonal treatment of minors insufficient and recommended puberty blockers, cross-sex hormones and surgery for minors be defined as investigational/experimental treatment requiring research oversight. English phrasing also quoted in Skrmetti opinion.