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Factor Assays / Inhibitors (Coag)
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Factor II
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Factor IX
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Factor V
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Factor V Leiden
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Factor VII
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Factor VIII
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Factor X
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Factor XI
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Factor XII
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Faeces - Clostridioides difficile (previously Clostridium difficile)
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Faeces food poisoning
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Farmer's lung (thermophilic actinomycetes, Saccharopolyspora rectivirgula)
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Farmer's Lung IgG (precipitins)
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Ferritin
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Fibrinogen
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Filarial serology
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Film (peripheral blood)
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FIP1L1-PDGFRa mutation
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Flavivirus serology (yellow fever, dengue, Japanese encephalitis, West Nile virus, tick borne encephalitis)
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Flu A, Flu B, RSV (respiratory syncytial virus) PCR
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Flucytosine assay
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Fluids - refer to specific fluid type for details
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Folate
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Follicle stimulating hormone
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Free Fatty Acids
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Free light chains
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Free Protein S
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Free T3
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Free T4
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Fructosamine
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Full Blood Count (FBC)
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Functional antibodies
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Fungal culture - see mycology