Group-I	Control group, no oxygen was given.
Group-II	Three sessions of NBO2 were administered at six-hour intervals within 24 h.
Group-III	Three sessions of HBO2 at 2 ATA were administered at six-hour intervals within 24 h.
Group-IV	Three sessions of HBO2 at 2.4 ATA were administered at six-hour intervals within 24 h.
Group-V	Total of 15 sessions of NBO2 were administered in 10 days as; 3 times a day on the first day (6-h intervals), two times a day on the second, third and fourth day (10-h intervals), and once a day for the last six days (22-h intervals).
Group-VI	Total of 15 sessions of HBO2 at 2 ATA were administered in 10 days as scheduled for Group V.
Group-VII	Total of 15 sessions HBO2 were administered as scheduled for Group V, but at 2.4 ATA.