[1
]
1 Pulmonary Research Institute, LungenClinic Grosshansdorf, Airway Research Center
North, Member of the German Center for Lung Research, Grosshansdorf, Germany.
[2
]
2 LungenClinic Grosshansdorf, Airway Research Center North, Member of the German Center
for Lung Research, Grosshansdorf, Germany.
[3
]
3 Fraunhofer Institute for Toxicology and Experimental Medicine, BREATH, Member of
the German Center for Lung Research, Hannover, Germany; and.
[4
]
4 Institute for Epidemiology, Social Medicine and Health System Research, Hannover
Medical School, Hannover, Germany.