Ventiv Health has acquired Burlington, Mass.-based patient compliance and persistency program provider Adheris, Ventiv said. Terms of the deal include Ventiv’s purchase for $60 million in cash and stock plus earn-out payments for exceeding specified financial targets. The Adheris brand is expected to remain, and the company will operate under Ventiv’s communication division, a Ventiv spokeswoman told MM&M.The deal is expected to close late in the first quarter, Ventiv said.