12429
However , if the probability of being causal and the effect size of the causal variants are inversely related to the minor allele frequency , then very rare variants do contribute to some power , however the absolute power remains low .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None