RT Journal Article SR Electronic T1 Novel method of locating the foramen ovale: a wobbly chair with shaky legs JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 69 OP 69 DO 10.1136/rapm-2021-102569 VO 47 IS 1 A1 Jose Luis De Córdoba A1 Carlos García-Marqueta A1 Núria Isach YR 2022 UL http://rapm.bmj.com/content/47/1/69.abstract AB