13504
For this purpose , markers of bone formation ( osteocalcin , procollagen I , osteoprotegerin , alkaline phosphatase ) and resorption ( telopeptides of collagen I , soluble receptor activator of nuclear factor - kappa B ligand ) , calciotropic hormones ( parathormone , calcitonin , 25 - hydroxyvitamin D and 1 , 25 - dihydroxyvitamin D ) in the serum , and the femur content of mineral ( including calcium - Ca and inorganic phosphorus - Pi ) and organic components were estimated in the rats exposed to 500mg Pb / l ( in drinking water ) or / and Et ( 5g / kg b . wt . / 24h , by oral gavage ) for 12weeks .
 Chemical: 25 - hydroxyvitamin D; Chemical: 1 , 25 - dihydroxyvitamin D; Chemical: calcium; Chemical: Ca; Chemical: phosphorus; Chemical: Pb
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 25 - hydroxyvitamin D; Chemical: 1 , 25 - dihydroxyvitamin D; Chemical: calcium; Chemical: Ca; Chemical: phosphorus; Chemical: Pb