Shareholders of the Irvine, Calif.-based ambulatory services technology company NextGen Healthcare Inc. will take sides in a bitter board battle Wednesday, when they will vote on whether to continue with what the company says is a "significant transformation and the momentum underway" or whether disgruntled founder Sheldon Razin will add board power through his own slate of director candidates. Razin founded NextGen as Quality Systems Inc. in 1974, led it for 25 years and still owns about 15 percent of the company. He remained chairman of its board until 2015 and has in recent years pushed for fellow director Lance Rosenzweig, a veteran of business the process outsourcing sector, to be named its CEO. Thwarted and aggrieved by what he calls the excessive control and influence of Chairman Jeffrey Margolis and others on the board – who have proposed candidates to fill his and Rosenzweig's seat – Razin this summer proposed an alternate slate of board candidates. (Read his most recent filing here .)