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. 2013 Aug 13;2013:723139. doi: 10.5402/2013/723139

(a)

n = 29 Eagle Biosciences
<50 nmol/L ≥50 nmol/L
LC-MS/MS
<50 nmol/L 4 (14%) 5 (18%)
≥50 nmol/L 10 (34%) 10 (34%)
Cohen's kappa −0.048