1. Mitchell T. Dubaniewicz is a student researcher, Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, and was on assignment with CDC/NIOSH/NPPTL.
2. Dana R. Rottach, PhD, is a Physical Scientist, and Patrick L. Yorio, PhD, is a Health Statistician; both at the National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, PA.