A. B. Siddique, Y. Jamshidi-Naeini, L. Golzarri-Arroyo, and D. B. Allison write: Ignoring Clustering and Nesting in Cluster Randomized Trials Renders Conclusions Unverifiable Siraneh et al conducted a clustered randomized controlled trial (cRCT) to test the effectiveness of additional counseling … Continue reading …