National surveillance of methicillin-resistant Staphylococcus aureus in Belgian hospitals indicates rapid diversification of epidemic clones, Denis, O., Deplano A., Nonhoff C., De Ryck R., de Mendonca R., Rottiers S., Vanhoof R., and Struelens M. , Antimicrob.Agents Chemother., 0/9/2004, Volume 48, Issue 9, Number 3629, p.3625 - 3629, (2004)