400
Calcitonin gene - related peptide levels during nitric oxide - induced headache in patients with chronic tension - type headache .
 Chemical: nitric oxide; Disease: headache; Disease: tension - type headache
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:
 Chemical: nitric oxide; Disease: headache; Disease: tension - type headache