1. Institute for Analytical and Bioanalytical Chemistry, University of Ulm, 89069 Ulm, Germany
2. Analytical Development Biologicals, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397 Biberach (Riss), Germany
3. Development NCE, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397 Biberach (Riss), Germany
4. Institute for Computational Physics, University of Stuttgart, 70569 Stuttgart, Germany