Peter Kessinger, Colorado State University, Environmental and Radiological Health Sciences, Fort Collins, United States, Marina Nieto-Caballero, Colorado State University, Atmospheric Science, Fort Collins, United States, Thomas Christopher James Hill, Colorado State University, Department of Atmospheric Science, Fort Collins, United States, Mark Hernandez, University of Colorado at Boulder, Civil, Environmental, and Architectural Engineering, Boulder, United States, Angela Bosco-Lauth, Colorado State University, Biomedical Sciences, Fort Collins, United States and Sheryl Magzamen, Colorado State University, Department of Environmental and Radiological Health Sciences, Fort Collins, United States