HCO 2021 Contact About Location Rules Contact Registration Participants Contact For any details regarding HCO 2021 please contact: Adrian Margea at +40723 007 563, adi.margea@gmail.com or Daniela Hogea at +4076 261 6046, dani.hogea@gmail.com or Andrei Tomoroga at +40727 919 349, tomorogaa@gmail.com