1. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
2. Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
3. Office of Telemedicine, Johns Hopkins Medicine, Baltimore, Maryland, USA.
4. Office of Johns Hopkins Physicians, Johns Hopkins Medicine, Baltimore, Maryland, USA.
5. Department of Otolaryngology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.