[1] Beers M, Berkow R.  The Merck Manual, 17th Ed.  1999.  Chapter 73;  Pneumonia: 601-616.

 

[2] Beers M, Berkow R.  The Merck Manual, 17th Ed.  1999.  Chapter 73;  Pneumonia: 601-616.
 

[3] Beers M, Berkow R.  The Merck Manual, 17th Ed.  1999.  Chapter 73;  Pneumonia: 601-616.
 

[4] www.niaid.nih.gov  National Institute of Allergy and Infectious Diseases.  December 2004. 
 

[5] Beers M, Berkow R.  The Merck Manual, 17th Ed.  1999.  Chapter 73;  Pneumonia: 601-616.
 

[6] Hunt C et al.  The clinical effects of vitamin c supplementation in elderly hospitalized patients with acute respiratory infection.  Int J Vitam Nutr Res.  1994; 64(3): 212-219.
 

[7] Hemila H, Douglas RM.  Vitamin C and acute respiratory infections.  Int J Tuberc Lung Dis.  1999 Sep; 3(9): 756-761.
 

[8] Pizzorno J, Murray M, Joiner-Bey H.  The Clinician's Handbook of Natural Medicine.  2002; Churchill Livingstone: New York. Pneumonia: 405-410.
 

[9] Nathens AB et al.  Randomized, prospective trial of antioxidant supplementation in critically ill surgical patients.  Ann Surg.  2002 Dec; 236(6): 814-822.
 

[10] Bhandari N et al.  Effect of routine zinc supplementation on pneumonia in children aged 6 months to 3 years:  a randomized, clinical trial in an urban slum.  BMJ. 2002 Jun 8; 324(7350): 1358.
 

[11] Schafer A, Adelman B.  Plasmin inhibition of platelet function and arachodonic acid metabolism.  J Clin Invest.  1985; 75: 456-461.
 

[12] Mills S, Bone K.  Principles and Practice of Phytotherapy.  2000; Churchill Livingstone; London.  Echinaceae: 354-362.
 

[13] Mills S, Bone K.  Principles and Practice of Phytotherapy.  2000; Churchill Livingstone; London.  Berberis Bark and Hydrastis Root: 286-296.