Joson, S. and Laxamana, J. 2020. Air Pollution and Nasal Mucociliary Clearance Time among Urban and Rural Residents in Two Philippine Communities. Philippine Journal of Otolaryngology Head and Neck Surgery. 35, 1 (May 2020), 33–35. DOI:https://doi.org/10.32412/pjohns.v35i1.1275.