1. Technical University of Denmark; National Institute of Aquatic Resources; Jaegersborg Allé 1 2920 Charlottenlund Denmark
2. University of Veterinary Medicine; Hannover, Foundation, Institute for Terrestrial and Aquatic Wildlife Research (ITAW); Werftstraße 6 25761 Büsum Germany
3. Marine Mammal and Turtle Division; Southwest Fisheries Science Center; National Marine Fisheries Service, NOAA; 8901 La Jolla Shores Drive La Jolla California 92037 U.S.A