Usefulness of a visual aid in achieving optimal positioning for spinal anesthesia: a randomized trial.
Usha GurunathanShakeel Meeran KunjuKaren Elizabeth HaySharyn van AlphenPublished in: BMC anesthesiology (2018)
This study was retrospectively registered 30 August 2016, with the Australian New Zealand Clinical trials registry (ACTRN12616001197426).