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25yo aam presents with sudden onset back pain, dark urine and 1d hx of fatigue. 2d ago he was treated with tmp-smx for sinusitis. G6pd levels are normal. cause of his pallor?

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1. 25yo aam presents with sudden onset back pain, dark urine and 1d hx of fatigue. 2d ago he was treated with tmp-smx for sinusitis. G6pd levels are normal. cause of his pallor?





 
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