Baudoin, Claude, Patrice Fardellone, and Jean-Luc Sebert. 1993. “Effect of Sex and Age on the Ratio of Cervical to Trochanteric Hip Fracture: A Meta-Analysis of 16 Reports on 36,451 Cases”. Acta Orthopaedica 64 (6):647-53. https://doi.org/10.3109/17453679308994590.