细心整理二、随机参照试验检索策略Box 6.4.a: Cochrane Highly Sensitive Search Strategy for identifying randomized trials in MEDLINE: sensitivity-maximizing version (2008 revision); PubMed format#1#2#3#4#5#6#7#8#9#10#11randomized controlled trial ptcontrolled clinical trial ptrandomized tiab placebo tiab drug therapy sh randomly tiab trial tiab groups tiab #1 or #2 or #3 or #4 or #5 or #6 or #7 or #8humans mh#9 and #10PubMed search syntaxpt denotes a Publication Type term; tiab denotes a word in the title or abstract; sh denotes a subheading; mh denotes a Medical Subject Heading (MeSH) term (exploded)mesh: noexp denotes a Medical Subject Heading (MeSH) term (not exploded); ti denotes a word in the title.Box 6.4.b: Cochrane Highly Sensitive Search Strategy for identifying randomized trials in MEDLINE: sensitivity- and precision-maximizing version (2008 revision); PubMed format#1#2#3#4#5#6#7#8#9#10randomized controlled trial pt controlled clinical trial ptrandomized tiab placebo tiab clinical trials as topic mesh: noexprandomly tiab trial ti#1 or #2 or #3 or #4 or #5 or #6 or #7humans mh#8 and #9PubMed search syntaxpt denotes a Publication Type term; tiab denotes a word in the title or abstract; sh denotes a subheading; mh denotes a Medical Subject Heading (MeSH) term (exploded);mesh: noexp denotes a Medical Subject Heading (MeSH) term (not exploded); ti denotes a word in the title.Box : Cochrane Highly Sensitive Search Strategy for identifying randomized trials in MEDLINE: sensitivity-maximizing version (2008 revision); Ovid format1234567891011randomized controlled trial.pt.controlled clinical trial.pt.randomized.ab.placebo.ab.drug therapy.fs.randomly.ab.trial.ab.groups.ab.1 or 2 or 3 or 4 or 5 or 6 or 7 or 8humans.sh.9 and 10Ovid search syntax.pt. denotes a Publication Type term; .ab. denotes a word in the abstract; .fs. denotes a floating subheading; .sh. denotes a Medical Subject Heading (MeSH) term;.ti. denotes a word in the title.Box 6.4.d: Cochrane Highly Sensitive Search Strategy for identifying randomized trials in MEDLINE: sensitivity- and precision-maximizing version (2008 revision); Ovid format12345678910randomized controlled trial.pt.controlled clinical trial.pt.randomized.ab.placebo.ab.clinical trials as topic.sh. randomly.ab.trial.ti.1 or 2 or 3 or 4 or 5 or 6 or 7 humans.sh.8 and 9Ovid search syntax.pt. denotes a Publication Type term; .ab. denotes a word in the abstract; .fs. denotes a floating subheading; .sh. denotes a Medical Subject Heading (MeSH) term;.ti. denotes a word in the title. Demonstration search strategies provides a demonstration search strategy for CENTRAL for the topic Tamoxifen for breast cancer. Note that it includes topic terms only (a randomized trial filter is not appropriate for CENTRAL). There is no limiting to humans only. The strategy is provided for illustrative purposes only: searches of CENTRAL for studies to include in a systematic review would have many more search terms for each of the concepts. provides a demonstration search strategy for MEDLINE (Ovid format) for the topic Tamoxifen for breast cancer. Note that both topic terms and a randomized trial filter are used for MEDLINE. The search is limited to humans. The strategy is provided for illustrative purposes only searches of MEDLINE for systematic reviews would have many more search terms for each of the concepts belowBox 6.4.e: Demonstration search strategy for the CENTRAL, for the topic Tamoxifen for breast cancer#1#2#3#4#5#6#7#8#9#10#11MeSH descriptor Breast Neoplasms explode all treesbreast near cancer*breast near neoplasm*breast near carcinoma*breast near tumour*breast near tumor*#1 OR #2 OR #3 OR #4 OR #5 OR #6MeSH descriptor Tamoxifen explode all treestamoxifen #8 OR #9#7 AND #10The NEAR operator defaults to within 6 words;* indicates truncationBox 6.4.f: Demonstration search strategy for the MEDLINE (Ovid format), for the topic Tamoxifen for breast cancer1234567891011.12.13.14.15.16.17.18.19.20.21.22.23.24.randomized controlled trial.pt.controlled clinical trial.pt.randomized.ab.placebo.ab.drug therapy.fs.randomly.ab.trial.ab.groups.ab.1 or 2 or 3 or 4 or 5 or 6 or 7 or 8humans.sh.9 and 10exp Breast Neoplasms/(breast adj6 cancer$).mp.(breast adj6 neoplasm$).mp.(breast adj6 carcinoma$).mp.(breast adj6 tumour$).mp.(breast adj6 tumor$).mp.12 or 13 or 14 or 15 or 16 or 17exp Tamoxifen/tamoxifen.mp.19 or 2011 and 18 and 21humans.sh.22 and 23The ADJ6 operator indicates within 6 words; $ indicates truncation;.mp. indicates a