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PITTSBURGH —

Sandra Perry and Melissa Dailey have worked together as Allegheny County 911 dispatchers and call takers, for 16 years. They said they have admired and respected one another, but rarely socialized. Friday they will share a bond most never will.

“How can you thank somebody for giving a part of themselves?” asked Sandra Perry.

Perry suffers from kidney disease. She gets dialysis seven days a week. The only cure is a kidney transplant. Her co-worker had no idea…