Establishing a network of specialist Porphyria centres - effects on diagnostic activities and services.

Orphanet J Rare Dis · 2012 · PMC3566976 · PMID 23227998

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an observed trendno p-value reported

With such small numbers of new diagnoses reported each year, it is not surprising that an observed trend of improvement in laboratory analyses offered alone is not enough to show an improved ability to diagnose certain porphyrias.

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