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Ankle-brachial index (ABI) |
Anorectal infections, STIs |
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Anthrax |
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Antibody and peptide tumor imaging |
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Urea nitrogen |
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Urethral pressure profile (UPP) |
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Uric acid crystals |
Urinalysis (UA) |
Urinalysis Chemstrip Screen |
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Urinary infections, viral |
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Urine 5-HIAA, quantitative (24-hour) in urine |