Wenk, M Teaching epidural insertion: a modified approach to combined spinal-epidural anaesthesia. [electronic resource] - British journal of anaesthesia Mar 2011 - 420-1 p. digital Publication Type: Letter ISSN: 1471-6771 Standard No.: 10.1093/bja/aer021 doi Subjects--Topical Terms: Anesthesia, EpiduralAnesthesia, SpinalAnesthesiology--educationEducation, Medical, Graduate--methodsHumans