Response to "Serum bioavailable 25-hydroxyvitamin D levels correlate with hepatocellular carcinoma survival".

We appreciate the interest of Zhai and colleagues in our article recently published in Hepatology on the association between serum levels of total, free, and bioavailable 25-hydroxyvitamin D (25OHD) and hepatocellular carcinoma (HCC) survival(1) . They raised three important points, especially the last two, which allow us to further evaluate the predictive performance of bioavailable 25OHD for HCC prognosis.