A) Variation in methicillin-resistant Staphylococcus aureus (MRSA) proportions between hospitals with AST results of >20 blood isolates, displayed by ranking of MRSA proportion (from lowest to highest). Only countries with more than one hospital are displayed. Hospital-specific proportions (open diamonds) are grouped per country. The solid horizontal bars represent the mean MRSA proportion per country. B) Local variation, showing the power-transformed variance being independent of the mean MR