1. United States Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific Code 71510, 53560 Hull Street, San Diego, California 92152, USA
2. National Marine Mammal Foundation, 2240 Shelter Island Drive Number 200, San Diego, California 92106, USA
3. Department of Rehabilitation Science, University at Buffalo, 626 Kimball Tower, Buffalo, New York 14214, USA