24528
Poor metabolizers ( PM ) have two non - functional alleles , extensive metabolizers ( EM ) are homozygous with two functional alleles or heterozygous with one functional allele and ultrarapid metabolizers ( UM ) have more than two functional alleles .
 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