The authors have voluntarily retracted this article [1] and it is no longer available for online public display because portions of the article are similar to a previous publication [2]. While there was no intention to use pre-existing work without appropriate attribution, the authors nonetheless extend their apologies to Dr. Miller and all others concerned.
Pre-publication history
The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1472-6939/11/20/prepub