KING OF PRUSSIA, Pa., Jan. 31, 2019 /PRNewswire/ — Camber Spine, a leading innovator in spine and medical technologies, today reported preliminary unaudited proprietary sales results (sales of products innovated and owned by the company) for the fourth quarter and full year ending December 31, 2018. These preliminary unaudited results include: Fourth quarter 2018, proprietary sales growth of …