to elucidate if psoriatic skin involvement induces changes in vitamin d metabolism , the serum concentrations of the major vitamin d metabolites ( 25-hydroxy-vitamin d ( 2+3 ) ( 25ohd ) , 1,25-dihydroxyvitamin d ( 2+3 ) ( 1,25 ( oh ) 2d ) , and 24,25-dihydroxyvitamin d ( 2+3 ) ( 24,25 ( oh ) 2d ) ) were studied in a group of patients with psoriasis , who had not been exposed to ultraviolet radiation at least three months before the investigation .
C1511567
skin involvement
C0033860
psoriasis