Hemoglobin.gastrointestinal.lower:PrThr:Pt:Stool:Ord:IA
hemoglobin.gastrointestinal.lower:prthr:pt:stool:ord:ia
Hemoglobin.gastrointestinal.lower [Presence] in Stool by Immunoassay
hemoglobin.gastrointestinal.lower [presence] in stool by immunoassay