Pierre Lafère MD-PhD, is now a full time professor at the Academic Hospital Erasme, departement of visceral anesthesia. As a member of the research groups from HE2B & ORPHY, he is one of the lead researcher on the physiopathology of oxygen in both anesthesia and extreme environement. During 10 years, he was an active member of the center for hyperbaric oxygen therapy within the Belgian Army where he treated hundreds of decompression accidents or arterial gas embolism. He is also a medical advisory consultant for DAN Europe Emergency Hotline and Member at large 2013 of the EUBS. He is now full professor at Academic Hospital Erasme - Université Libre de Bruxelles - Belgium