1. Department of Medicine, Anschutz Medical Campus, University of Colorado, Aurora, Colorado;
2. Department of Medicine, Bichat Hospital, Paris, France;
3. Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;
4. Research Unit for Protein Science, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany; and
5. Department of Immunology and Genomic Medicine and Center for Genes, Environment and Health, National Jewish Health, Denver, Colorado