Table 4.

Search strategy in the Web of Science database.

Item	Index terms
#1	TS = (Acupuncture OR Scalp acupuncture OR Electroacupuncture)
#2	TS = (Mild cognitive impairment OR Benign seneslent forgetfulness OR Age-related cognitive decline OR Cognitive impairment-no dementia) OR Mild cognitive decline OR Age-associated memory impairment OR Forgetfulness OR Hypomnesia OR Memory decline)
#3	TS = (System evaluation OR System review) OR Meta analysis)
#4	#1 AND #2 AND #3

TS = topic search: search included title, abstract, author keywords, and Keywords Plus.