1. Assistant leader, U.S. Fish and Wildlife Service (USFWS), Cooperative Fish and Wildlife Research Unit (CFWRU), University of Maine, Orono, ME 04469.
2. Leader, USFWS, CFWRU, University of Idaho, Moscow, ID 83843.
3. Research veterinarian, USFWS, Patuxent Wildlife Research Center, Laurel, MD 20708.
4. Conservation Officer, Department of Conservation, Twizel, New Zealand.