Butler-Wu,S.M., Burns,E.M., Pottinger,P.S., Magaret,A.S., Rakeman,J.L., Matsen,F.A.,III, Cookson,B.T. Optimization of periprosthetic culture for diagnosis of Propionibacterium acnes prosthetic joint infection. J Clin Microbiol. 2011/7; 7: 2490-2495