. 2016 Sep;60(9):646–651. doi: 10.4103/0019-5049.190620
Copyright: © 2016 Indian Journal of Anaesthesia
This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
Figure 1.
Methods of data collection