Horacio Lopardo1, María Alejandra Blanco1, Laura Vigliarolo2, Paula Gagetti 3, Alejandra Corso3 and WHONET Collaborative Group (28 centers from 20 cities) (Abstract)
XVII Lancefield International Symposium on Streptococci and Streptococcal Diseases. 22-26 Junio 2008. Porto Heli. Grecia