4384
To test this hypothesis we performed an experimental pain study in seven healthy volunteers , using the same positioning in the PET scanner as in the migraine patients .
 Disease: pain; Disease: migraine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: pain; Disease: migraine