1. Environmental Medicine Consortium and Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough, Raleigh, North Carolina 27606, USA
2. Nicholas School of the Environment Marine Laboratory and Integrated Toxicology Program, Duke University, 135 Duke Marine Lab Rd., Beaufort, North Carolina 28516, USA
3. Environmental Medicine Consortium and Department of Microbiology, Pathology and Parasitology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough, Raleigh, North Carolina 27606, USA