Reply to Choosing a Comparator: Minimizing Baseline Differences Between Groups

Affiliations

• ¹ Keck School of Medicine, University of Southern California, Los Angeles, California.
• ² Department of Population Public Health Sciences, University of Southern California, Los Angeles, California; Division of Gastroenterology and Liver Diseases, University of Southern California, Los Angeles, California.
• ³ Division of Gastroenterology and Liver Diseases, University of Southern California, Los Angeles, California. Electronic address: brian.lee@med.usc.edu.