∗Specialist Trainee in Anesthesia, United Kingdom

†Speciality Doctor in Anesthesia, United Kingdom

‡Department of Pain Medicine, University Hospitals of Leciester NHS Trust, Leicester, United Kingdom

Address correspondence and reprint requests to G Niraj, M.D., Department of Pain Medicine, University Hospitals of Leicester NHS Trust, Gwendolen Road, Leicester LE5 4PW, United Kingdom; E-mail: [email protected]

Conflict of interest: The authors disclose no conflicts of interest.

Funding: The University Hospitals of Leicester NHS Trust supported the project.