CARLSBAD, Calif., June 27, 2019 (GLOBE NEWSWIRE) — Alphatec Holdings, Inc. (“ATEC” or the “Company”) (Nasdaq: ATEC), a provider of innovative spine surgery solutions dedicated to revolutionizing the approach to spine surgery, today announced the appointment of Karen McGinnis to its Board of Directors.  The Company also announced that it is joining the Russell 2000® …