1. Department of Medicine, Stanford University School of Medicine, Division of Infectious Diseases and Geographic
Medicine, Stanford, CA, USA
2. Department of Cardiothoracic Surgery and Adult Cardiac Surgery, School of Medicine
Stanford University, Stanford, CA, USA
3. Santa Clara Valley Medical Center, Department of Pathology, San Jose, CA,
USA
4. Department of Medicine, Division of AIDS Medicine & Infectious Diseases, Santa Clara Valley Health & Hospital
System, San Jose, CA, USA