20981
In this study , chondrocytes were isolated from rat articular cartilage by enzymatic digestion and cultured for 24 - 72 h with 1 - 5 mM strontium .
 Chemical: strontium
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: strontium