Author’s contributions
IM and JH conceived the study. RM and FW classified Leipzig trees into
allergenic and non-allergenic. KdH developed air pollution grids. IM
assigned all GIS variables to participants, analysed the data and wrote
the first draft of the manuscript. FW contributed to drafting the first
version of the manuscript. CB assisted with the data analysis. JH, GH
and MS have made substantial contributions to the conception, design and
acquisition of the LISA Leipzig data. All authors involved in the result
interpretation and text revision. All authors approved the final
manuscript.