https://www.mckinsey.com/featured-insights/mckinsey-explainers/what-is-burnout?cid=other-eml-onp-mip-mck&hlkid=b12a88aac4c04929abf516932a1f516f&hctky=12019884&hdpid=60702cad-1050-4a02-b596-3505c53abf04