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Common Test-Ordering Errors
Part 1: Misordered Tests

1,25-Dihydroxyvitamin D
PTH-related Peptide
Uroporphyrinogen III Synthase


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Sources of Vitamin D

Slide 8

April 2010

Vitamin D is obtained either in the diet or is derived intrinsically, a process involving sun exposure.

Sources of Vitamin D


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