48
Participants
Start Date
July 31, 2015
Primary Completion Date
October 31, 2021
Study Completion Date
December 31, 2021
Intervention N/A. Observational study
There are no interventions to the subjects other than collection of an expectorated sputum since this is an observational study; There are no study groups.See details per detailed study description.
University of North Carolina at Chapel Hill, Chapel Hill
University of Alabama at Birmingham, Birmingham
University of Washington, Seattle
University of North Carolina, Chapel Hill
OTHER