DEERFIELD, Ill., Aug. 01, 2019 (GLOBE NEWSWIRE) — RTI Surgical Holdings, Inc. (Nasdaq: RTIX), a global surgical implant company, reported operating results for the second quarter of 2019. Second Quarter 2019 Highlights: Revenue of $82.3 million, up approximately 16% compared to the second quarter of 2018Net income of $0.7 millionAdjusted EBITDA of $9.9 million, or …