Reply to Niu and Drain

Affiliations

• ¹ Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, Colorado, USA.
• ² Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
• ³ Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
• ⁴ Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA.