RT Journal Article SR Electronic T1 Abdominal point-of-care ultrasound before anesthesia in a patient with an unstable C-spine JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1289 OP E1289 DO 10.1503/cmaj.220525 VO 194 IS 37 A1 Anahi Perlas A1 Rodrigo Nakatani A1 Laura GirĂ³n-Arango YR 2022 UL http://www.cmaj.ca/content/194/37/E1289.abstract