This author has not been identified. It may be one of the following persons: Look up 'Birgit Penzenstadler' in GoogleThis author has not been identified. Look up 'Leticia Duboc' in GoogleThis author has not been identified. Look up 'Colin C. Venters' in GoogleThis author has not been identified. Look up 'Stefanie Betz' in GoogleThis author has not been identified. Look up 'Norbert Seyff' in GoogleThis author has not been identified. Look up 'Krzysztof Wnuk' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Ruzanna Chitchyan' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Steve M. Easterbrook' in GoogleThis author has not been identified. Look up 'Christoph Becker' in Google