1 23 Air Quality, Atmosphere & Health An International Journal ISSN 1873-9318 Air Qual Atmos Health DOI 10.1007/s11869-016-0392-5 Association between EMS calls and fine particulate air pollution in Utah Scott T. Youngquist, Cody H. Hood, Nicholas M. Hales, Caleb C. Barton, Troy E. Madsen & C. Arden Pope