1. a U.S. Environmental Protection Agency , National Exposure Research Laboratory , Research Triangle Park, NC 27711, USA
2. b University of North Carolina at Chapel Hill , Institute of Marine Sciences , Morehead City, NC 28557, USA
3. c National Oceanic and Atmospheric Administration , On assignment to the U.S. Environmental Protection Agency , National Exposure Research Laboratory , Research Triangle Park, NC 27711, USA
4. d U.S. Environmental Protection Agency , National Exposure Research Laboratory , 944 E. Harmon, Las Vegas, NV 89193, USA
5. e U.S. National Aeronautics and Space Administration , Office of the Associate Director for Operations , Dryden Flight Research Center, Edwards, CA 93523, USA