1. Biotoxin Metrology, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada
2. School of Marine and Environmental Sciences, University of South Alabama, 600 Clinic Drive, Mobile, Alabama 36688, United States
3. Marine Ecotoxicology, Dauphin Island Sea Lab, Dauphin Island, Dauphin Island, Alabama 36528, United States