18781
Consequently , scientific and clinical evidence has emerged that suggests multiple antinociceptive mechanisms for botulinum toxins in a variety of painful disorders , including : chronic musculoskeletal , neurological , pelvic , perineal , osteoarticular , and some headache conditions .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None