Reduced 1a-hydroxylase Activity in Human Prostate Cancer Cells Correlates with Decreased Susceptibility to 25-Hydroxyvitamin D3-induced Growth Inhibition Reduced 1a-hydroxylase Activity in Human Prostate Cancer Cells Correlates with Decreased Susceptibility to 25-Hydroxyvitamin D3-induced Growth Inhibition2018-01-17T17:02:55-05:00