Table 2.

Example of PubMed search strategy.

ID	Search strategy	Result
#1	Search: (“acupuncture, ear”[mesh]) OR ((((((((((((acupunctures, ear[title/abstract]) OR (auricular acupuncture[title/abstract])) OR (ear acupuncture[title/abstract])) OR (acupuncture, auricular[title/abstract])) OR (auricular acupressure[title/abstract])) OR (auricular pressing[title/abstract])) OR (auricular plaster[title/abstract])) OR (auricul∗[title/abstract])) OR (auricular acupoint∗[title/abstract])) OR (auricular point∗[title/abstract])) OR (auricular therapy[title/abstract])) OR (ear buried seeds[title/abstract]))	1,270
#2	Search: (“drug therapy”[mesh]) OR ((((((((therapy, drug[title/abstract]) OR (drug therapies[title/abstract])) OR (therapies, drug[title/abstract])) OR (chemotherap∗[title/abstract])) OR (pharmacotherap∗[title/abstract])) OR (cancer∗[title/abstract])) OR (antineoplastic agents[title/abstract])) OR (drug therap∗[title/abstract]))	3,349,312
#3	Search (((“vomiting”[mesh]) OR emesis[title/abstract]) OR “nausea”[mesh]))	42,016
#4	#1 AND #2 AND #3	8