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Table 2 Würzburg Methodological Quality Score (W-MeQS) for the assessment of the quality of laboratory methods.

From: Systematic review with meta-analysis: cytokines in fibromyalgia syndrome

1 Standardized method OR citation OR new method with adequate description including 2-5?
2 Adequate description of the method itself?
3 Sensitivity limits of the method declared?
4 Adequate internal controls measured?
5 Adequate negative controls measured?
6 Adequate number of samples investigated?
7 Adequate comparison with the control group?
8 All reagent information given?
9 Time points of tissue/blood collection standardized and given?
10 Measurements or data assessment performed in a blinded manner?
11 Adequate data assessment and illustration?
12 Target of interest investigated with > 1 method?