Volume expired during 0.5 s of forced expiration:Vol:Pt:Respiratory system:Qn
volume expired during 0.5 s of forced expiration:vol:pt:respiratory system:qn
Volume expired during 0.5 s of forced expiration:Vol:Pt:Respiratory system:Qn
volume expired during 0.5 s of forced expiration:vol:pt:respiratory system:qn