1. Characterisation and Comparability Laboratory, NIBRT − the National Institute for Bioprocessing Research and Training, Foster Avenue, Mount Merrion, Blackrock Co, Dublin A94 X099, Ireland
2. MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, U.K.
3. School of Chemical Engineering and Bioprocessing, University College of Dublin, Belfield, Dublin 4, Ireland