1. Univ. of Copenhagen; Faculty of Life Sciences, Dep. of Basic Sciences and Environment; Thorvaldsensvej 40 DK-1871 Frederiksberg Denmark
2. Univ. of Aarhus; Faculty of Agricultural Sciences; Forsøgsvej 1 DK-4200 Slagelse Denmark
3. DHI Water ·Environment · Health; Agern Allé 5 DK-2970 Hørsholm Denmark
4. Rambøll Danmark; Teknikerbyen 31 2830 Virum