1938
In this study , we have characterized MAGEL2 ( also known as NDNL1 ) , a gene with 51 % amino acid sequence similarity to necdin and located 41 kb distal to NDN in the PWS deletion region .
 PWS
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 PWS