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Maternal uniparental disomy ( UPD ) for chromosome 15 is responsible for an estimated 30 % of cases of Prader - Willi syndrome ( PWS ) .
 Disease: Maternal uniparental disomy ( UPD ) for chromosome 15; Disease: Prader - Willi syndrome; Disease: PWS
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: Maternal uniparental disomy ( UPD ) for chromosome 15; Disease: Prader - Willi syndrome; Disease: PWS