24
Participants
Start Date
December 31, 2012
Primary Completion Date
February 28, 2013
Study Completion Date
February 28, 2013
Nasal filter
Active nasal filter
Placebo nasal filter
Placebo nasal filter
Aarhus University, School of Public Health, Department of Environmental & Occupational Medicine, Aarhus
Spirare ApS
UNKNOWN
University of Aarhus
OTHER