| http://www.w3.org/ns/prov#value | - They also rated the quality of each study on a 4-category scale (poor, fair, good, and excellent) based on randomized controlled trial (RCT) quality criteria that included factors such as adequacy of randomization, concealment of allocation, masking of study personnel and patients or parents, and statistical analysis.9 Disagreements in either abstraction or quality rating were adjudicated by senio
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