Authors: Zwart, S Ruijs, GJHM Sachs, APE Schellekens, JFP de Melker, RA

Citation: S. Zwart et al., Potentially virulent strains and high colony counts of group A beta-haemolytic streptococci in pharyngitis patients having a delayed recovery or a complication, J ANTIMICRO, 47(5), 2001, pp. 689-691

Authors: Zwart, S Sachs, APE Ruijs, GJHM Gubbels, JW Hoes, AW de Melker, RA

Citation: S. Zwart et al., Penicillin for acute sore throat: randomised double blind trial of seven days versus three days treatment or placebo in adults, BR MED J, 320(7228), 2000, pp. 150-154

Authors: Zwart, S Ruijs, GJHM Sachs, APE Van Leeuwen, WJ Gubbels, JW De Melker, RA

Citation: S. Zwart et al., Beta-haemolytic streptococci isolated from acute sore-throat patients: Cause or coincidence? A case-control study in general practice, SC J IN DIS, 32(4), 2000, pp. 377-384