Systemic biomarkers of neutrophilic inflammation, tissue injury and repair in COPD patients with differing levels of disease severity. oleh Debra A Cockayne, Donavan T Cheng, Benjamin Waschki, Sriram Sridhar, Palanikumar Ravindran, Holly Hilton, Galina Kourteva, Hans Bitter, Sreekumar G Pillai, Sudha Visvanathan, Kai-Christian Müller, Olaf Holz, Helgo Magnussen, Henrik Watz, Jay S Fine