title: Interpretation of vitamin D status may be affected by  alternative supplementation.
authors: Peter
authors: P
authors: Elder
authors: John
authors: J
authors: Lewis
authors: Richard
authors: R
authors: King
authors: Chris
authors: C
authors: Florkowski
mesh_terms: D019587:Dietary Supplements; D006801:Humans; D015203:Reproducibility of Results; D014808:Vitamin D Deficiency / Q000175:diagnosis* / Q000628:therapy*