Impact of Different Volumes of Pericapsular Nerve Group Block on Pain During Spinal Anesthesia Positioning and Postoperative Opioid Requirements in Femoral Fracture Surgeries; Randomized Prospective Study. - Ertaş, Gamze; Çakmak, Hamiyet Şenol; Akdeniz, Sevda; Yurtbay, Alparslan; Polat, Ebru; Yigit, Yavuz; Sertöz, Nezih; Tulgar, Serkan (Journal of Pain Research, 2024)