7-Dehydrocholesterol:PrThr:Pt:Ser/Plas:Ord
7-dehydrocholesterol:prthr:pt:ser/plas:ord
7-Dehydrocholesterol:Presence or Threshold:To identify measures at a point in time:Serum/Plasma:Ordinal
7-dehydrocholesterol:presence or threshold:to identify measures at a point in time:serum/plasma:ordinal