Temperature-related changes in airborne allergenic pollen abundance and seasonality across the northern hemisphere: a retrospective data analysis, Lewis, Ziska, Makra László, Harry Susan, Bruffaerts Nicolas, Hendrickx Marijke, Coates Frances, Saarto Annika, Thibaudon Michel, Gilles Oliver, Damialis Athanasios, et al. , The Lancet Planetary Health, Jan-03-2019, Volume 3, Issue 3, (2019)