229
To determine if the occurrence of 4003delTC in these unrelated families signifies propagation of an ancestral allele or a mutational hot spot , haplotypes were determined for polymorphisms both within and flanking COL17A1 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None