Observation:Prid:Pt:Respiratory system specimen.lower:Nom:Toluidine blue O stain
observation:prid:pt:respiratory system specimen.lower:nom:toluidine blue o stain
Observation:Prid:Pt:Respiratory system specimen.lower:Nom:Toluidine blue O stain
observation:prid:pt:respiratory system specimen.lower:nom:toluidine blue o stain