16652
Therefore , we concluded that the variations of MT1A SNPs may influence urine UA and NAG excretion in chronic lead - exposed workers , and urine creatinine - adjusted urine UA as a biomarker of lead toxicity should be considered .
 Chemical: creatinine
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: creatinine