1. Department of Laboratory Medicine Yale School of Medicine New Haven Connecticut USA
2. Department of Pathology, Anatomy, and Cell Biology Thomas Jefferson University Hospital Philadelphia Pennsylvania USA
3. Ethics Consultation Service & Pulmonary Section, Medical Service Veterans Affairs Loma Linda Healthcare System Loma Linda California USA
4. Division of Pulmonary and Critical Care Medicine, Department of Medicine Loma Linda University School of Medicine Loma Linda California USA
5. Department of Pathology, Microbiology & Immunology Vanderbilt University Medical Center Nashville Tennessee USA
6. Department of Pathology, Division of Transfusion Medicine and Hemostasis University of Texas Southwestern Dallas Texas USA