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Because of the small size of most pedigrees and the high incidence of sudden death , however , molecular genetic studies of IVF have not yet been done .
 Disease: sudden death; Disease: IVF
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: sudden death; Disease: IVF