21474
Haploinsufficiency of the gene encoding the insulin - like growth factor 1 receptor ( IGF1R ) , either caused by telomeric 15q26 deletions , or by heterozygous point mutations in IGF1R , segregate with short stature and various other phenotypes , including microcephaly and dysmorphic facial features .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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