By  on April 15, 2019

Mark Bertolini used to think he had all the answers. After all, the former chief executive of health insurance giant Aetna was Ivy League-educated, graduated top of his class in finance and had proven himself over time as a serious player in the business world.

For him, it was just a matter of playing a waiting game until all of his coworkers and subordinates came to the natural conclusion that he was right.

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