Dear All
Thanks to Stephen Adelstein for his information on assay availability
We assay for IL-6 (and selected other cytokines) at   RPA on an irregular cycle 
 – that is, results may be delayed depending   on the number of samples that we receive.  We use addressable bead   assays.  
In my (limited) experience the levels of IL-6 reflect CRP measurement very closely.
Stephen  
Stephen AdelsteinHead, Department of Clinical Immunology | Royal Prince Alfred Hospital
Missenden Road, Camperdown, NSW 2050 Australia
Tel
 02 9515 7585  | Fax
02 9515 7585  | Fax   02 9515 7762  |   stephen.adelstein@sydney.edu.au
02 9515 7762  |   stephen.adelstein@sydney.edu.au