2641
Osteocalcin ( and urinary hydroxyproline ) were not elevated in isolated hyperphosphatasaemia , indicating that mechanisms other than increased bone turnover may account for the markedly elevated serum alkaline phosphatase activity in these subjects .
 Osteocalcin, serum alkaline phosphatase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Osteocalcin, serum alkaline phosphatase