Institution: | 1. Ruhr‐Universit?t Bochum, Fakult?t für Mathematik, Bochum, Germany;2. Continentale Krankenversicherung a.G. Ruhrallee 92, Dortmund, Germany;3. Novartis Pharma AG, Lichtstrasse 35, 4002 Basel, Switzerland and Shanghai University of Finance and Economics, People's Republic of China |