Susceptibility of staphylococci and enterococci to antimicrobial agents at different ward levels in four north European countries. - Claesson, Carina; Hällgren, Anita; Nilsson, Maud; Svensson, Erik; Hanberger, Håkan; Nilsson, Lennart E.; THE SCOPE STUDY GROUP (Scandinavian Journal of Infectious Diseases, 2007)