Preoperative hemoglobin levels and mortality outcomes after hip fracture patients oleh Bassem I. Haddad, Mohammad Hamdan, Mohammad Ali Alshrouf, Abdallah Alzubi, Ahmed Khirsheh, Ahmad Al-Oleimat, Mohammad Aldabaibeh, Rayyan Al-Qaryouti, Waleed Abulubbad, Munther Al-Saber, Mohammad Jabaiti, Abdulrahman M. Karam