XRLabs: Extended Reality Interactive Laboratories. - Chairi Kiourt; Dimitris Kalles; Aris S. Lalos; Nikolaos Papastamatiou; Panayotis Silitziris; Evgenia Paxinou; Helena G. Theodoropoulou; Vasilis Zafeiropoulos; Alexandros Papadopoulos; George Pavlidis (CSEDU (1), 2020)