CoxHealth announced promotions for four key leadership positions Wednesday. The advances became effective Sunday and follow the retirement of President/CEO Robert Bezanson, whose last day with CoxHealth was Saturday. Steven D. Edwards will replace Bezanson as president/CEO of CoxHealth. Moving up within CoxHealth are: John Duff, MD, senior vice president/CHO; Ken Powell, MD, chairman JOC, chief integrated physicians; Ron Prenger, vice president, chief clinical officer; Brian Williams, vice president, chief business development.