1052
Genetic alterations at final sigma such as loss of heterozygosity were rare ( 1 / 20 informative cases ) , and no mutations were detected ( 0 / 34 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 None