"The four key symptoms of CFS are:

Post-Exertional Malaise and/or Fatigue

• Post-Exertional Malaise 
  Marjorie van de Sande  
  
  

Pain

• Neurocognitive Impairment in CFS 
  Dr. John DeLuca
  
• Brain Problems in ME/CFS 
  Dr. Elizabeth G. Dowsett
  Satori-5     www.satori-5.co.uk/me/me_003.html
  
• Cognitive Function in ME/CFS: Information for ME/CFS Physicians 
  Dr. Eleanor Stein
  
• The Blood-Brain Barrier & Its Possible Connection to ME/CFS 
  Dr. Alan Logan
  
• Chronic Fatigue Syndrome Versus Depression
  Dr. Pierre Flor-Henry

Autonomic Manifestations

• CFS as Heart Failure Secondary to Mitochondrial Malfunction - A Protocol
  Dr. Sarah Myhill     Nov. 29, 2006
  
• The Symptom of Orthostatic Intolerance in Chronic Fatigue Syndrome  
  Dr. David Bell   Nov. 29, 2006
  
• Cardiac Insuffiency Hyposthesis  
  ME Society of America    
  
• Orthostatic Intolerance  
  Dr. David Bell     
  

Neuroendocrine Dysfunctions

• The Role of the Hypothalamus  
  Dr. Jacob Teitelbaum
  Co-Cure     www.co-cure.org/

Immune Dysfunction

• Immune Dysfunction  
  Dr. Kenny De Meirleir