Re: Breathing Zone Representation -Reply

[William Lorenzen <LORENZEN_W@A1.TCH.Harvard.edu>]

          Even which side of the head you sample makes a big difference too.  
          Is the person right handed or left handed? Where are the airborne 
          contaminants in reference to the sampler? 
          
          This is not a scientific issue in my opinion.  After many samples 
          on both the right side and the left side as well as a sampler that 
          samples both sides at the same time I have found no logic to the 
          results that show one method as preferable over another or that 
          justifies the method as "representative".
          
          William A. Lorenzen
          Children's Hospital
          Boston. MA 02115
          
          lorenzen_w@a1.tch.harvard.edu
          

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