3
This study was undertaken to determine the effects of OCT on serum PTH levels and bone turnover in states of normal or impaired renal function .
 Chemical: OCT; Disease: impaired renal function
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: OCT; Disease: impaired renal function