1. U.S. Geological SurveyWestern Fisheries Research Center6505 Northeast 65th StreetSeattleWashington98115USA
2. Department of Medicine and EpidemiologyUniversity of California2108 Tupper Hall, One Shields AvenueDavisCalifornia95616USA
3. U.S. Fish and Wildlife ServiceIdaho Fish Health Center276 Dworshak Complex DriveOrofinoIdaho83544USA