1. Cervical epidural analgesia in current anaesthesia practice: systematic review of its clinical utility and rationale, and technical considerations 
H. Shanthanna, N. Mendis, A. Goel 
British Journal of Anaesthesia 
Volume 116, Issue 2, Pages (February 2016)
DOI: /bja/aev453
Copyright © 2016 The Author(s) Terms and Conditions

2. Fig 1 PRISMA Flow Diagram: study screening and selection.
British Journal of Anaesthesia  , DOI: ( /bja/aev453)
Copyright © 2016 The Author(s) Terms and Conditions

3. Fig 2
A pictorial representation of the cervical neuraxial anatomy showing an epidural needle entering the posterior epidural space.
British Journal of Anaesthesia  , DOI: ( /bja/aev453)
Copyright © 2016 The Author(s) Terms and Conditions