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She had been brushing broken-up road surface off the pavement at her house when she sized up the potholes and said to herself: "Och, just go for it".

"It hasn't been possible to identify both B och T cell receptors in their microenvironments using previous methods."

In addition to Tovey and Och, Koch is by son Tom Koch, daughter Christine Koch, son Martin Koch, 10 grandchildren, 11 great-grandchildren and one great-great-granddaughter.

Sculptor Capital Management, where founder Dan Och is battling the firm's current chief executive in court over his rising pay, posted a 13% drop.

According to an April regulatory filing, Levin and Och are among Sculptor's largest shareholders, and controlled a respective 20.2% and 14.4% of its voting power.