"Agent Affecting Respiratory System"^^ . "Agent_Affecting_Respiratory_System"^^ . "An agent that exerts a physiologic effect on any anatomic entity that is part of the respiratory tract and airways.NCI" . . "Agent Affecting Respiratory SystemPTNCI" . "C78273"^^ . . "C2697974"^^ . "Chemical Viewed Functionally"^^ . "Agent Affecting Respiratory System"^^ .