1. Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
2. Department of Emergency Medicine, Texas A&M, Christus Spohn Emergency Medicine Residency Program, Corpus Christi, TX, USA
3. Oak Ridge Institute for Science and Education, Division of Laboratory Sciences, National Center for Environmental Health,Centers for Disease Control and Prevention, Atlanta, GA, USA
4. Battelle Memorial Institute, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
5. Department of Pulmonary and Critical Care Medicine, Christus Spohn Shoreline Hospital, Corpus Christi, TX, USA