1. Department of Ecology, Evolution & Behavior, University of Minnesota, 1987 Upper Buford Circle, St. Paul, MN 55108, U.S.A.
2. Porini consulting, 18527 73rd Avenue NE, Kenmore, WA 98028, U.S.A.
3. D4D Technologies, 630 International Parkway #150, Richardson, TX 75081, U.S.A.