Hypobaric Unilateral Spinal Anesthesia Versus General Anesthesia for Hip Fracture Surgery in the Elderly: A Randomized Controlled Trial. - Simonin M; Delsuc C; Meuret P; Caruso L; Deleat-Besson R; Lamblin A; Huriaux L; Abraham P; Bidon C; Giai J; Riche B; Rimmelé T (Anesthesia and analgesia, 2022)