Your earlier proof was data from 3 hospitals in Korea, this new and irrefutable proof is from 1 hospital in Taiwan?
"Studies involving the handling of human blood samples were approved by the institutional review board of Taipei Veterans General Hospital, Taiwan"
The test appears to have limitations:
"The variations between individuals were high with the SD being greater than the mean value. This HPLC method may not be ideal for the measurement of low serum concentrations, but concentrations greater or equal to median values were quantifiable......."
So, the conclusion is that it's a good test for half the patients.... and the other half?