1. EMPA—Swiss Federal Laboratories for Materials Science and Technology, CH-9014 St. Gallen, Switzerland
2. Agroscope Reckenholz-Tänikon, Research Station ART, CH-8046 Zurich, Switzerland
3. EPFL—Ecole Polytechnique Fédérale de Lausanne, CH-1015
Lausanne, Switzerland
4. Federal Office for Agriculture FOAG, CH-3003 Bern, Switzerland
5. Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH-8600
Duebendorf, Switzerland