No abstract available
MeSH terms
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Adult
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Aged
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Antirheumatic Agents / adverse effects
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COVID-19 / complications
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COVID-19 / diagnosis*
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COVID-19 Drug Treatment*
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Humans
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Hydroxychloroquine / adverse effects*
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Male
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Methemoglobinemia / chemically induced*
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Methemoglobinemia / diagnosis*
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Methemoglobinemia / etiology
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Middle Aged
Substances
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Antirheumatic Agents
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Hydroxychloroquine