19856
CONCLUSIONS : These findings suggest that acupuncture alleviates cue - induced cravings through the regulation of activity in brain regions involved in attention , motivation , and reward relative to craving scores in the initial abstinence phase .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None