1. Laboratory of Biophysics and Surface Analysis, Department of Pharmaceutical Sciences, The University of Nottingham, University Park, Nottingham, NG7 2DX, United Kingdom, Polymer Materials Research Group, Institute of Biomedical Technologies, University of Gent, Krijgslaan 281, S-4 bis, B-9000 Gent, Belgium, and Johnson & Johnson Clinical Diagnostics Ltd., Pollards Wood, Chalfont St. Giles, Buckinghamshire, United Kingdom