Short-term effect of pollen and spore exposure on allergy morbidity in the Brussels-Capital Region., Guilbert, Ariane, Simons Koen, Hoebeke Lucie, Packeu Ann, Hendrickx Marijke, De Cremer Koen, Buyl Ronald, Coomans Danny, and Van Nieuwenhuyse An , Ecohealth, 2016 Jun, Volume 13, Issue 2, p.303-15, (2016)