24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 &#x7C; Serum or Plasma &#x7C; Chemistry - non-challenge
24,25-dihydroxyvitamin d3+24,25-dihydroxyvitamin d2 &#x7c; serum or plasma &#x7c; chemistry - non-challenge