Price CS, Huynh H, Paule S, Hollis RJ, Noskin GA, Pfaller MA, Peterson LR. Comparison of an automated ribotyping system to restriction endonuclease analysis and pulsed-field gel electrophoresis for differentiating vancomycin-resistant Enterococcus faecium isolates. J Clin Microbiol. 2002 May; 40(5):1858-61.