1. Department of Laboratory Medicine, Cleveland Clinic, Cleveland, OH, USA
2. Department of Pathology, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA
3. Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
4. Clinical Virology Laboratory, Stanford Health Care, Stanford, CA, USA
5. Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA