Bias attributable to the use of a composite outcome in evaluating a cocoa extract supplement

Affiliations

• ¹ From the School of Physical Therapy, Universidad Industrial de Santander, Bucaramanga, Colombia. Electronic address: pcramire@uis.edu.co.
• ² School of Public Health, Department of Epidemiology, Laboratório de Inferência Causal em Epidemiologia (LINCE-USP), University of São Paulo, São Paulo, Brazil (FAD-Q).