id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-355535-01h8yyqj	Zheng, Xue-yan	Regional, age and respiratory-secretion-specific prevalence of respiratory viruses associated with asthma exacerbation: a literature review	2018-01-11		.txt	text/plain	3290	179	39	The primary focus was on the prevalence of respiratory viruses, including AdV (adenovirus), BoV (bocavirus), CoV (coronavirus), CMV (cytomegalovirus), EnV (enterovirus), HSV (herpes simplex virus), IfV (influenza virus), MpV (metapneumovirus), PiV (parainfluenzavirus), RV (rhinovirus) and RSV (respiratory syncytial virus) during asthma exacerbations. A standardized form was used for data extraction, including the main characteristics (author, year of publication, sample size, age, definition of exacerbation, quality, detection method, study design and season), primary outcome (the prevalence of viral infection during asthma exacerbations), and secondary outcomes (the prevalence of viruses in different strata). We also did a subgroup analysis to assess the weight of viral infection on asthma exacerbations with respect to geographic region, population, type of respiratory tract secretion examined, and detection method. Because difference in the geographic regions, age, study population, type of respiratory tract secretion, and detection method significantly confound the determination of the prevalence of individual viruses, heterogeneity was not assessed in this study.	./cache/cord-355535-01h8yyqj.txt	./txt/cord-355535-01h8yyqj.txt