Media type: E-Article Title: Why are allergies increasing? Contributor: Ring, Johannes; Krämer, Ursula; Schäfer, Torsten; Behrendt, Heidrun imprint: Elsevier BV, 2001 Published in: Current Opinion in Immunology Language: English DOI: 10.1016/s0952-7915(01)00282-5 ISSN: 0952-7915 Origination: Footnote: