Surveillance of antibiotic resistance in non invasive clinical isolates of Streptococcus pneumoniae collected in Belgium during winters 2003 and 200436771, Vanhoof, R., Carpentier M., Cartuyvels R., Damee S., Fagnart O., Frans J., Gordts B., Glupczynski Y., Goffinet P., Govaerts D., et al. , Acta Clin.Belg., 0/3/2006, Volume 61, Issue 2, Number 57, p.49 - 57, (2006)