What should be the appropriate duration of cardiopulmonary resuscitation?

Cite this paper

@article{LpezMessa2017WhatSB, title={What should be the appropriate duration of cardiopulmonary resuscitation?}, author={Juan Bautista L{\'o}pez-Messa}, journal={Medicina intensiva}, year={2017}, volume={41 3}, pages={188-190} }