Correction: Sample Size Requirements to Test Subgroup-Specific Treatment Effects in Cluster-Randomized Trials

Affiliations

• ¹ Department of Biostatistics, Yale School of Public Health, New Haven, CT, USA.
• ² Section of Geriatrics, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA.
• ³ Division of Biostatistics, Department of Population Health, NYU Grossman School of Medicine, New York, NY, USA.
• ⁴ Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada.
• ⁵ School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada.
• ⁶ Department of Biostatistics, Yale School of Public Health, New Haven, CT, USA. fan.f.li@yale.edu.
• ⁷ Center for Methods in Implementation and Prevention Science, Yale School of Public Health, Suite 200, Room 229, 135 College Street, New Haven, CT, 06510, USA. fan.f.li@yale.edu.