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Mice harbouring an intragenic deletion in Snrpn are phenotypically normal , suggesting that mutations of SNRPN are not sufficient to induce PWS .
 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: PWS