SAN DIEGO, Jan. 13, 2020 /PRNewswire/ — NuVasive, Inc. (NASDAQ: NUVA), the leader in spine technology innovation, focused on transforming spine surgery with minimally disruptive, procedurally integrated solutions, today announced preliminary unaudited revenue results for the fourth quarter and full year 2019. Fourth Quarter 2019 Highlights Revenue of approximately $310 million, increased approximately 8% on both a reported and constant …