S., L., Chetambath, R., Sunny, A., Shivashankaran, S. and Aslam, M. 2019. Aspergillus spp. infection as a cause of acute exacerbations of chronic obstructive pulmonary disease: a prospective observational study. International Journal of Research in Medical Sciences. 7, 5 (Apr. 2019), 1604–1609. DOI:https://doi.org/10.18203/2320-6012.ijrms20191644.