1. Division
of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, United States
2. Department
of Chemistry, Cumberland University, Lebanon, Tennessee 37087, United States
3. Department
of Physical Sciences, Lander University, Greenwood, South Carolina 29649, United States
4. Department
of Chemistry, West Kentucky Community and Technical College, Paducah, Kentucky 42001, United States
5. Oak Ridge Institute
for Science and Education Fellow at the Centers for Disease Control and Prevention, Atlanta, Georgia 30341, United States
6. Battelle at the Centers for Disease Control and Prevention, Atlanta, Georgia 30341, United States
7. Department
of Chemistry and Physics, Emmanuel College, Boston, Massachusetts 02115, United States