Paudel D, Chettri S, Shah S, Shah B, Manandhar S, Mishra S. The Effect of Pterygopalatine Fossa Block (PPFB) during Endoscopic Sinus Surgery (ESS) on Intraoperative Bleeding: A Randomized Control Trial. JBPKIHS. 2018;1(2):35-41. doi:10.3126/jbpkihs.v1i2.22076