3585
Homozygous and heterozygous deletions of the von Willebrand factor gene in patients and carriers of severe von Willebrand disease .
 von Willebrand, severe von Willebrand disease
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 von Willebrand, severe von Willebrand disease