1. Division of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
2. Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
3. Division of Hematology, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, Minnesota, USA
5. Division of Neurology, Mayo Clinic, Rochester, Minnesota, USA
6. Division of Rheumatology, Mayo Clinic, Rochester, Minnesota, USA
7. Division of Radiology, Mayo Clinic, Rochester, Minnesota, USA
8. Division of Hematology-Oncology, University of Alabama at Birmingham, Birmingham, Alabama, USA
9. Department of Research Collaborator (limited-tenure), on behalf of the Mayo Clinic Histiocytosis Working Group Mayo Clinic, Rochester, Minnesota, USA