Analysis of 25-hydroxyvitamin D in plasma using solid phase extraction.
Shephard
G S
GS
MRC Metabolic Research Group, Tygerberg Hospital, South Africa.
Carlini
S M
SM
Hanekom
C
C
Labadarios
D
D
D002112:Calcifediol / Q000097:blood*; D006801:Humans; D013056:Spectrophotometry, Ultraviolet
D002112:Calcifediol