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UER
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Searching | Internet Searching
Searching
Medline on the Internet
Searching
Medline on the Internet (PubMed)
PubMed http://www.ncbi.nlm.nih.gov/entrez
provides
access to:
- all Medline articles
1966 - present
- PreMedline records
- records in progress
- publisher supplied
citations - brief
- some may never
be assigned MeSH and end up in Medline, but will remain accessible
in PubMed
- MeSH search will
NOT include these
- HealthSTAR, AIDSline
and others coming soon
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Simple
Searching
- if you simply enter
your search terms in the search box, PubMed will automatically
try to map terms to MESH headings, as well as other obvious places
(Journal list etc) and also searches the term as a text word.
- if more than one
term is entered they are each and then ANDED together.
- for example, searching:
"vitamin c common cold" results in: ((("ascorbic
acid"[MeSH Terms] OR vitamin c[Text Word]) AND ("common
cold"[MeSH Terms] OR common cold[Text Word])) AND notpubref[sb])
- to view exactly
how Pubmed interpreted your search click on the "Details"
button.
Phrase
Matching
- if you enter a
phrase the system will check check against Mesh tables, journal
index and a phrase list. If it doesnít find the phrase,
it will search the words ANDED together. To force the system
to do a phrase search put quotation marks around the phrase.
Truncation
- the truncation
symbol is *
- the system will
return the first 150 variations of a truncated term. If a truncated
term, produces more than 150 variations, PubMed warns you.
- phrases that include
a space in a word after the asterisk will NOT be included; for
instance, "infection*" includes "infections,"
but not "infection control."
- truncation turns
off automatic term mapping to MESH headings etc.
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Displaying
Results
- the system will
default to show a certain number of documents at a time in a
certain format. Both of these defaults can be changed.
Clipboard
- citations that
you wish to collect (for printing or downloading) can be saved
to the clipboard (note that the citation number changes color
so if you find the same article later in another search you wonít
add it to the clipboard again).
- items can be deleted
or added to the clipboard and will stay saved on the clipboard
as long as you remain active on the system.
- items in the clipboard
will be automatically deleted after one hour of inactivity.
Related
Citations
- click on the "Related
Citations" link to connect to related articles and textbook
citations.
Printing
and Downloading (to
disk)
- use SAVE to download
results to a disk.
- change format to
.txt to print using a text editor.
- will download selected
results OR entire search - not just those shown on the screen.
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Boolean
Operators
- capitalize the
operators AND, OR, NOT.
Field
Specific Searching
- to specify field(s)
to search use the Limit function or identify field tags. For
example: (aids [mh] OR hiv [mh]) AND (alternative medicine [mh]
OR complimentary [tw])
History
- use the History
function to view all of your searches. You can combine previous
searches - seeing all your searches - can combine searches
by using set numbers. For example: #2 AND #6.
Limits
- limit your search
to: specific fields, publication type, ages, publication date
or date range, language, human or animal, etc.
MeSH
Browser
- use the MeSH Browser
to select MeSH terms. Note that unless you specify otherwise
terms will be automatically exploded (meaning they will include
all the subterms) when you search them from the Browser.
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Journal
Browser
- to search for specific
journals with "Link Out" feature to some online journals.
Clinical
Queries
- based on research
done at McMaster
- uses preset "filters"
to maximize return of clinical studies
- goal at McMaster:
"To develop optimal MEDLINE search strategies for retrieving
sound clinical studies of the etiology, prognosis, diagnosis,
prevention, or treatment of disorders in adult general medicine."
Citation
Matcher Option
- the Citation Matcher
options allow you to find the citation or the PubMed ID of any
article in the PubMed database using bibliographic information.
Use this function to locate specific known citations.
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