References:
 

 

 


                                          

 

 

 

 

 

 

   Principles of Anatomy and Physiology Torora and Grabowski

 

   Physiology 4th edition Robert M. Berne and Matthew N. Levy

 

   www.asthma.com

 

  www.agius.com

  

  www.insidebaltimore.com

 

  Times newspaper 21/04/02

  

  1st Aid Manual –7th edition

 

  http://www.westernroad.co.uk/asthma3.jpg 

 

 

 

 

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