Influence of patient-related factors and surgeon experience on functional outcomes in conservatively treated proximal humerus fractures: a retrospective cohort study - Andrea Pautasso; Chiara Bernardi; Marco Assom; Davide Blonna; Federica Romano; Raffaele Garofalo; Alessandro Marinelli; Paolo Paladini; Filippo Castoldi; Enrico Bellato (European Journal of Orthopaedic Surgery & Traumatology, 2026)