Assertion: histamine's effect | /r/HasProperty | baeumer et al.
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text: For example, no effect was observed with H 4 R antagonists in an acute canine atopic dermatitis model or when 2,4-dinitrochlorobenzene or toluene-2,4-diisocyanate were used as the hapten in mice (Rossbach et al., 2009; Baeumer et al., 2011).