Burbach G J, Heinzerling L M, Röhnelt C, Bergmann K-C, Behrendt H, Zuberbier T
Allergy. 2009 Apr;64(4):664-5. doi: 10.1111/j.1398-9995.2009.01975.x. Epub 2009 Feb 5.
Ambrosia has now reached threshold for high prevalence allergen in Europe.
豚草现已达到欧洲高流行率过敏原的阈值。