aDepartment of Molecular Virology and Microbiology

bDepartment of Medicine

cDepartment of Pediatrics, Section of Infectious Diseases, Baylor College of Medicine, Houston, Texas, USA

Correspondence to Jennifer A. Whitaker, MD, Baylor College of Medicine, Assistant Professor of Molecular Virology & Microbiology and Medicine, Infectious Diseases, 1 Baylor Plaza, MS-280, Houston, TX 77030, USA. E-mail: [email protected]