Rigid locked antegrade versus retrograde intramedullary nailing in treating acute humeral shaft fractures: a systematic review with meta-analysis - Lanuza Lagunilla,L.; Muriel García,A.; Díaz Heredia,J.; Ruiz Díaz,R.; González Sastre,V.; Ruiz Ibán,M.Á. (EFORT Open Reviews, 2026)