30326
Twenty - four hour urine N - telopeptide ( NTX ) was measured by Elisa and serum estradiol was measured by ultrasensitive radioimmunoassay at baseline , and at 6 months .
 Chemical: N; Chemical: estradiol
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: N; Chemical: estradiol