SRS-A--observations concerning the establishment of a standard material for reference.
D000818:Animals; D004306:Dose-Response Relationship, Immunologic; D006168:Guinea Pigs; D008168:Lung / Q000276:immunology; D009130:Muscle, Smooth / Q000276:immunology; D013189:SRS-A / Q000302:isolation & purification / Q000494:pharmacology / Q000592:standards*
D013189:SRS-A