Hi Mary,
 
I suppose you could be right about the technology.  I am going to the WCH hospital today.  I'll find out how old their machine is.  I rang a hospital in Britian (I know it's not here but you have to work with what you know sometimes) To find out when they replaced their machine.  They have had the same on for 15 years, used differently over the years but not changed.  I Would think you could successfully argue that the data is relevant if the technology is unchanged.  -  I had a quick scout around and couldn't find anything that interesting past the 2001 paper I already referenced.  However it is all very boring to read through.
 
 It would be very interesting if someone out there at a hospital could find out how old the references for the protocols are. 
 
Do you mind me asking Mary, do you work in the government scheme in Perth or are you independent? 
Lisa Barrett
 

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