Effects of butterbur treatment in intermittent allergic rhinitis: a placebo-controlled evaluation.
- 2004-07
- RCT · n = 21
- Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology 93(1)
- Robert D Gray
- Kay Haggart
- Daniel K C Lee
- Steven Cull
- Brian J Lipworth
- PubMed: 15281472
- DOI: 10.1016/s1081-1206(10)61447-0
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- High evidence