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Gayle Cook, who alongside her late husband, Bill Cook, created the multi-billion-dollar family of companies now called Cook Group, died Sunday, the company announced. She was 91.

Gayle was the first quality-control employee of Cook Incorporated, a company she and her husband founded in the spare bedroom of their Bloomington apartment in 1963. That company, which manufactured less-invasive surgical medical devices, evolved into one of the largest companies in the state and is a globally known leader i

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