1 Division of Pulmonary, Allergy and Sleep Medicine, Department of Medicine, Mayo Clinic, Jacksonville, Fla.
2 Division of Pulmonary, Allergy and Sleep Medicine, Department of Medicine, Mayo Clinic, Jacksonville, Fla. Electronic address: gonzalez.alexei@mayo.edu.
3 Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minn.
4 Department of Emergency Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minn.