Comparative long-term trend analysis of daily weather conditions with daily pollen concentrations in Brussels, Belgium., Bruffaerts, Nicolas, De Smedt Tom, Delcloo Andy, Simons Koen, Hoebeke Lucie, Verstraeten Caroline, Van Nieuwenhuyse An, Packeu Ann, and Hendrickx Marijke , Int J Biometeorol, 2018 March, Volume 62, Issue 3, Number 491, (2018)