Warning: Altitude Sickness Shouldn't Be Taken Lightly Article from Health World about the effects of altitude on exercise. http://www.healthy.net/asp/templates/news.asp?Id=2473

Outdoor Action Guide to High Altitude Description of altitude related illnesses, their symptoms and their treatment. http://www.princeton.edu/~oa/safety/altitude.html

Apex Altitude A charity that exists to perform high altitude medical research and educate the public about the topic http://www.apex-altitude.com/

Healthy Me Basic information, including a bibliography. http://www.ahealthyme.com/topic/topic13676

Altitude Illness Summary of prevention and treatment methods. http://ciwec-clinic.com/altitude/

British Mountaineering Council - Mountain Medicine Centre Information on altitude related illnesses with a focus on climbing at altitude. http://www.thebmc.co.uk/world/mm/mm0.htm

Merck Manual of Diagnosis and Therapy Chapter from the Merck Manual on altitude sickness covering causes, treatment, and prevention. http://www.merck.com/pubs/mmanual/section20/chapter281/281a.htm

WebMD Questions and answers about travel to destinations at altitude. Submit a question or read previously submitted questions and answers. http://my.webmd.com/question_and_answer/article/1676.50847

Supplemental Oxygen for the General Aviation Pilot Article on determining the need for supplemental oxygen at density altitude. http://www.dr-amy.com/rich/oxygen/

Special Safety Considerations for High Altitude Mountaineering Article on the effects of altitude with an emphasis on climbing at altitude. http://www.cmc.org/cmc/safetyha.html

Altitude Sickness and Atmospheric Pressure Basic information plus a utility to calculate the atmospheric pressure at any altitude. http://www.personal.usyd.edu.au/~gerhard/pressure.html

High-Altitude Pulmonary Edema: Current Concepts Abstract of a 1996 article summarizing the current state of HAPE research and treatment. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=Display&DB=PubMed

High Altitude Pathology Institute High altitude travel advice. Information on chronic mountain sickness, high altitude pulmonary edema, the use of hyperoxic/hypoxic adaptation chambers, and triple hypoxia syndrome. http://www.geocities.com/CapeCanaveral/6280/

Hypoxia Information about the International Hypoxia Symposium including abstracts. http://www.hypoxia.net/

Medex and Medical Expeditions Information about and from this research charity dedicated to investigating the mechanisms of altitude related illness. Newsletter archive and planned expedition information. http://www.medex.org.uk/

High-Altitude Medical Guide Information on the prevention, recognition, and treatment of altitude illness, as well as other health issues affecting travelers to destinations at altitude. http://www.high-altitude-medicine.com/

International Society for Mountain Medicine Altitude tutorial. Newsletter archive. About the World Congress on Mountain Medicine and High Altitude Physiology. http://www.ismmed.org

Mechanism for Life-Threatening High-Altitude Sickness Uncovered Article from the American Heart Association on a study of the mechanism that causes HAPE. http://www.newswise.com/articles/2001/4/ALTITUDE.HRT.html

Into the Heavens Slide presentation on altitude and its physiological effects from Samford University's Physiology of Exercise course. http://www.samford.edu/schools/education/essm/PHED473/altitudeandillness/

Cerebral Syndromes Article from Emergency Medicine covering cerebral syndromes in altitude sickness from AMS to HACE. http://www.emedicine.com/emerg/topic22.htm