May 16, 2016 08:30 ET    LEESBURG, Va., May 16, 2016 (GLOBE NEWSWIRE) — K2M Group Holdings, Inc. (NASDAQ:KTWO) (the “Company” or “K2M”), a global medical device company focused on designing, developing and commercializing innovative and proprietary complex spine and minimally invasive spine technologies and techniques, today announced that research on K2M’s RAVINE® Lateral Access […]