Hypersensitivity, Delayed

• Arizona Health Sciences Center — Tucson, Arizona, United States
• University of California - San Francisco — San Francisco, California, United States
• National Jewish Health — Denver, Colorado, United States
• Yale University — New Haven, Connecticut, United States

• Universitair Ziekenhuis Gent — Ghent, Belgium
• Gentofte Hospital Copenhagen — Hellerup, Copenhagen, Denmark
• Thoraxklinik Heidelberg — Heidelberg, Baden-Wurttemberg, Germany
• Hospital Grosshansdorf — Großhansdorf, Schleswig-Holstein, Germany

• Duke Clinical Research Institute — Durham, North Carolina, United States

• University of Cincinnati — Cincinnati, Ohio, United States

• dermatology department, Hadassah university hospital — Jerusalem, Israel
• Department of Dermatology, Hadassah Hospital — Ein Karem, Jerusalem, Israel

• Regional Pulmonary Clinic, Clalit Health Services — Haifa, Israel
• Regional Clinic for Pulmonary Disease, Haifa and Western Galilee, Clalit Health Services — Haifa, Israel

• Bronchoscopy suite, PGIMER — Chandigarh, India

• Chest Clinic, PGIMER — Chandigarh, India

Not specified

• National Jewish Medical and Research Center — Denver, Colorado, United States