Impact of short-term exposure to air pollution on natural mortality and vulnerable populations: a multi-city case-crossover analysis in Belgium, Demoury, Claire, Aerts Raf, Berete Finaba, Lefebvre Wouter, Pauwels Arno, Vanpoucke Charlotte, Van der Heyden Johan, and De Clercq Eva M. , Environmental Health, Jan-12-2024, Volume 23, Issue 1, (2024)