Kathy Donovan, CEO of the Children’s Hospital of Michigan and COO of the Detroit Medical Center, is leaving this month "for personal reasons," according to a statement released Monday by the Detroit-based medical group. The statement didn't provide details about Donovan's resignation. Her last day is Dec. 23, the statement said. Donovan became chief executive officer of the Children's Hospital in June 2020, according to press reports at the time.