RT Journal Article SR Electronic T1 Point of care ultrasound: worthy endeavor for every perioperative anesthesiologist JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 939 OP 940 DO 10.1136/rapm-2020-101325 VO 45 IS 11 A1 Ban C H Tsui YR 2020 UL http://rapm.bmj.com/content/45/11/939.1.abstract AB