The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Background
Although studies have investigated the association between early‐life exposure to fine particulate matter (PM2.5) and childhood asthma/wheezing, results are inconsistent and the susceptible exposure window remains largely unknown.
Methods
A prospective birth cohort study was conducted to recruit pregnant women during their early pregnancy, and to follow up them and their children up...