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The only instance of disassociation of B27 and spondylitis in a family was where the proband had ulcerative colitis as well as spondylitis .
 spondylitis, ulcerative colitis, spondylitis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 spondylitis, ulcerative colitis, spondylitis