TY - JOUR T1 - Ultrasound-guided maxillary nerve block via the pterygopalatine fossa: maxillary artery is the key JF - Regional Anesthesia & Pain Medicine JO - Reg Anesth Pain Med DO - 10.1136/rapm-2020-101400 SP - rapm-2020-101400 AU - Xiachuan Qin AU - Xisheng Xie Y1 - 2020/06/09 UR - http://rapm.bmj.com/content/early/2020/06/09/rapm-2020-101400.abstract N2 - ER -