【Hyperbaric Oxygen Therapy】Patients receive hyperbaric oxygen therapy (HBO) in a sealed multi-place chamber at a pressure of 2.5 atmospheres absolute (ATA). The treatment starts with the compression of air pressure from 1 ATA to 2.5 ATA in 15 minutes. Patients breathe with 100% medical grade O2 with mask for 25 minutes and take off the mask for O2 break for 5 minutes, and then, repeat breathing 100% O2 with mask for another 25 minutes and off mask for O2 break for 5 minutes. At the end of treatment, the chamber air pressure is decompressed from 2.5 ATA with O2 mask to 1 ATA in 15 minutes. Each patient receives HBO daily, five days a week for a total of 40 treatments.