(AP) — Michigan's elections board gave the go-ahead Monday for a petition drive seeking to limit what hospitals can charge uninsured and underinsured patients and auto accident victims. A report by a nonpartisan Citizens Research Council of Michigan concluded last year that the unlimited benefits are a reason for higher medical spending in the state, but bigger factors include auto insurers having the primary responsibility for paying the bills, their lack of market power to negotiate lower payments and their inability to implement cost controls. Republican Gov.