Response

Affiliations

• ¹ Imbio, Inc, Minneapolis, MN.
• ² Department of Radiology, University of California at San Diego, San Diego, CA.
• ³ Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI; Department of Epidemiology, University of Michigan, Ann Arbor, MI. Electronic address: oldhamj@med.umich.edu.