Verified Certificate

Supported by the following organizations

This is to certify that Roberto Heycher Cardiel Soto successfully completed and received a passing grade in PH559x: Causal Diagrams: Draw Your Assumptions Before Your Conclusions a course of study offered by HarvardX, an online learning initiative of Harvard University.

Noted by

Miguel Hernán

Miguel Hernán

Kolokotrones Professor of Biostatistics and Epidemiology Harvard T.H. Chan School of Public Health