A systematic review of threshold values of pollen concentrations for symptoms of allergy

Nadine Steckling‐Muschack, Hanna Mertes, Isabella Mittermeier, Paul Schutzmeier, Jana Becker, Karl‐Christian Bergmann, Stephan Böse‐O’Reilly, Jeroen Buters, Athanasios Damialis, Joachim Heinrich, Michael Kabesch, Dennis Nowak, Sandra Walser‐Reichenbach, Alisa Weinberger, Mihai Zamfir, Caroline Herr, Susanne Kutzora, Stefanie Heinze