Incidence of Ichthyophonus hoferi in Puget Sound fishes and its increase with age of Pacific herring - Hershberger, P.K.; Stick, K.; Bui, B.; Carroll, C.; Fall, B.; Mork, C.; Perry, J.A.; Sweeney, E.; Wittouck, J.; Winton, J.; Kocan, R. (Journal of Aquatic Animal Health, 2002)