Erratum to "Nosocomial infections due to methicillin-resistant Staphylococcus aureus and vancomycin-resistant enterococci at a university hospital in Taiwan from 1991 to 2003: resistance trends, antibiotic usage and in vitro activities of newer antimicrobial agents" [Int J Antimicrob Agents 2005;26:43-9] (DOI:10.1016/j.ijantimicag.2005.04.007)