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4) FEDERAL AVIATION ADMINISTRATION OFFICE OF AVIATION MEDICINE, CIVIL AEROMEDICAL INSTITUTE PUBLICATIONS:ALTITUDE-INDUCED DECOMPRESSION SICKNESS. http://www.2pi.com/les/flying/faa 400altitude.html
5) Himalayan Rescue Association Nepal:Hyperbaric Treatment. http://www.himalayanrescue.org/hra/index.php
6) The High Altitude Medicine Guide. http://www.high-altitude-medicine.com/
7) CIWEC Clinic Travel Medicine Center. http://www.ciwec-clinic.com/
8) ISMM (International Society for Mountain Medicine):An Altitude Tutorial http://www.ismmed.org/np altitude tutorial.htm
9) AMS Worksheet. http://www.ismmed.org/ams worksheet.htm