1147
Genetic ( rs11898505 ) and non - genetic factors ( age , number of falls in a year and L1 - 4 BMD ) could work in concert to contribute to the risk of osteoporotic fractures .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None