1. Department of Oral Health Sciences; KU Leuven & Dentistry; University Hospitals Leuven; Kapucijnenvoer 33 3000 Leuven Belgium
2. Center for Microbial Ecology and Technology (CMET); Ghent University; Coupure links 653 9000 Gent Belgium
3. Bio- and Chemical Systems Technology; Reactor Engineering and Safety Section; Department of Chemical Engineering; KU Leuven; Celestijnenlaan 200F (bus 2424) 3001 Leuven Belgium
4. Colgate-Palmolive Technology Center; Piscataway NJ