Fig. 4

Forest plot of meta-regression and subgroup analyses for sensitivity and specificity. Ssize100: sample size > 100; Prevalence: prevalence above 15%; Country: European countries; Disease: percentage of patients with hematological malignancy above 50%; Criteria: revised EORTC/MSG criteria in 2008; Walldisruption: proteinase for cell wall disruption; DNAisolation: phenol–chloroform for DNA isolation protocol; PCR: real-time PCR; Primer: 18S rRNA primer