BACKGROUND In response to occupational and environmental exposures, cough can be an isolated symptom reflecting exposure to an irritant with little physiological consequence, or it can be a manifestation of more significant disease. This document reviews occupational and environmental contributions to chronic cough in adults, focusing on aspects not previously covered in the 2006 ACCP Cough Gui...

this study attempts to investigate the relationship between pollution and economic growth for two groups of countries according to environmental kuznets curve hypothesis for a sample of 24 developing countries and 26 oecd countries over the period 1980 - 2005. then, we examine this hypothesis using modern econometrics techniques including panel co-integration and panel unit-root. the panel data...

considerable consequence of households’ consumption expenditure changes is on energy using in agricultural sector and in other economical sectors. the main objective of this paper was to study of consequences increasing rural and urban households expenditures on changing of energy using in agricultural sector and on producing of environmental pollutants in khorasan razavi province. for this pur...

background: dental students have reported a high prevalence of psychological stress and the causes are associated with the challenging dental environmental and demographic factors. this study aimed to conduct a preliminary investigation on dental students’ stress status, using a sample of first-to-third-year bachelor of dental surgery students in an australian university. special interests incl...