EA. Effects of infused histamine: correlation of plasma histamine levels and symptoms. J Allergy Clin Immunol 1982;69:283-9. 54. Ind PW, Brown MJ, Lhoste FJ, Macquin I, Dollery CT. Concentration effect relationships of infused histamine in normal volunteers. Agents Actions 1982;12:12-6. 55. Morrow JD,