1. HINTS on using literature databases Louis Volkers & Gerdien de Jonge Medical Library - Erasmus MC info.mb@erasmusmc.nl phone 87785

2. Medical Library Erasmus MC10-10-20052 Introduction 1.Literature retrieval: the procedure 2.Available databases 3.How to access fulltext articles 4.Hints on PubMed 5.Demonstration 6.Questions?

3. Medical Library Erasmus MC10-10-20053 Literature retrieval: the procedure  Problem definition  What is the problem? What do you want to know?  Put the question into words as a full sentence, the best one is a question that can be answered with 'yes' or 'no‘  Which are the important items in the question?  Generate synonyms and equivalencies  Be aware of British / American differences in spelling: tumour OR tumor; haemoglobin OR hemoglobin  What type of combinations? AND OR NOT  Which database(s) to use?  Perform searches, and find references  Evaluate the results  Eventually repeat previous steps  Collect relevant articles, read and interprete those  Did this answer your question?

4. Medical Library Erasmus MC10-10-20054 Available literature databases  Primary literature (results of original research)  articles in journals (printed, electronic)  books, reports, etc.  Secundary literature (derivations of primary literature)  compilations, often with summaries (indexes)  PubMed (Medline), PsycInfo, Web-of-Science, PiCarta (EMbase is not available; at this moment it is too expensive for us, there is an extensive overlap with the free Medline)  Scopus (test), Google Scholar, searchable sites of publishers (Elsevier SciDir)  Reviews, systematic reviews, meta-analyses  Cochrane Library (Database of Systematic Reviews)  UpToDate (a kind of an e-book on internal medicine and pediatrics)

5. Medical Library Erasmus MC10-10-20055 How to access fulltext articles?  Available in Erasmus MC:  a collection of about 700 printed journals (in the Medical Library)  a connection to about 4000 electronic journals (on the internet)  Which? See the Alphabetic List of All Journals on MB home  Journal not available? Request a photocopy (online request form; not for free)  PubMed opens up for about 4500 journals  start PubMed from MB home to see fulltext links  change Display = Abstract for clickable links to accessible fulltext:

6. Medical Library Erasmus MC10-10-20056 Types of search strategies (Example: PubMed)  Free-text search search words in all fields  Subject search search subjects with standardized keywords (MeSH) PubMed combines both searches, depending on search terms  Limit search restrict to several attributes (f.e. age groups, type of research )  Index search search by selecting terms in alphabetic lists  Combine searches: AND OR NOT

7. Medical Library Erasmus MC10-10-20057 Combinations

8. Medical Library Erasmus MC10-10-20058 Types of search strategies (Example: PubMed)  Free-text search search words in all fields  Subject search search subjects with standardized keywords (MeSH) PubMed combines both searches, depending on search terms  Limit search restrict to several attributes (f.e. age groups, type of research )  Index search search by selecting terms in alphabetic lists  Combine searches: AND OR NOT

9. Medical Library Erasmus MC10-10-20059 Subject search in Medline: standard keywords  MeSH: Medical Subject Headings Genotype Follow-Up Studies  additional subheadings (depends on type of keyword) Peptidyl-Dipeptidase A/genetics* Cardiovascular Diseases/mortality  used as major topic* or minor topic  functional tree structure > explosion of terms

10. Medical Library Erasmus MC10-10-200510 Subject search in Medline: standard keywords  MeSH: Medical Subject Headings Genotype Follow-Up Studies  additional subheadings (depends on type of keyword) Peptidyl-Dipeptidase A/genetics* Cardiovascular Diseases/mortality  used as major topic* or minor topic  functional tree structure > explosion of terms

11. Medical Library Erasmus MC10-10-200511 Record in PubMed (Display = Citation)

12. Medical Library Erasmus MC10-10-200512 Subject search in Medline: standard keywords  MeSH: Medical Subject Headings Genotype Follow-Up Studies  additional subheadings (depends on type of keyword) Peptidyl-Dipeptidase A/genetics* Cardiovascular Diseases/mortality  used as major topic* or minor topic  functional tree structure > explosion of terms

13. Medical Library Erasmus MC10-10-200513 MeSH - tree

14. Medical Library Erasmus MC10-10-200514 Types of search strategies (Example: PubMed)  Free-text search search words in all fields  Subject search search subjects with standardized keywords (MeSH) PubMed combines both searches, depending on search terms  Limit search restrict to several attributes (f.e. age groups, type of research )  Index search search by selecting terms in alphabetic lists  Combine searches: AND OR NOT

15. Medical Library Erasmus MC10-10-200515 How to find search terms?  just type your words (not the optimal way for a scientist)  click [MeSH Database] > type word > see MeSH terms > see MeSH tree > select MeSH term or select subheadings > add to search box > perform search  type the word(s) > [Go] > [Details] > see Automatic Term Mapping (next slide)  type the word(s) restricted to Title field f.e. genet*[ti] AND statist*[ti] > [Go] > change [Display=Summary] into [Display=Citation] > see the records indicated by 'indexed for MEDLINE' > usefull terms in the MeSH field? (demonstration)

16. Medical Library Erasmus MC10-10-200516 Automatic Term Mapping Automatic Term Mapping search terms are automatically mapped to MeSH terms Conditions for searching:  do NOT search with word roots and a wildcard (*)  do NOT search "quoted phrase"  do NOT search by indexes (except for MeSH index)  do NOT search in special fields (f.e. title) (except ALL fields or MeSH field)

17. Medical Library Erasmus MC10-10-200517 Automatic Term Mapping Automatic Term Mapping search terms are automatically mapped to MeSH terms Conditions for searching:  do NOT search with word roots and a wildcard (*)  do NOT search "quoted phrase"  do NOT search by indexes (except for MeSH index)  do NOT search in special fields (f.e. title) (except ALL fields or MeSH field) When term mapping succeeded, PubMed searches like this (click Details): subject in MeSH fields OR text word in all text fields f.e. search term = red blood cell => erythrocytes[MeSH Terms] OR red blood cell[Text Word] (n=127877) f.e. search term = red blood cell* => red blood cell[All Fields] OR red blood cells[All Fields] (n=34658)

18. Medical Library Erasmus MC10-10-200518 SDI: What's new in Medline? SDI: What's new in Medline? automatical updates via "My NCBI" In "My NCBI" you can:  save your searches  automatic check for new citations by e-mail  special filter selections

19. Medical Library Erasmus MC10-10-200519 SDI: What's new in Medline? SDI: What's new in Medline? automatical updates via "My NCBI" In "My NCBI" you can:  save your searches  automatic check for new citations by e-mail  special filter selections Actions:  First time: register; next time: log in with username and password  Configure display filters  Save searches, and configure e-mail updates  View "My NCBI"; make updates manually

20. Medical Library Erasmus MC10-10-200520 Locations in the Medical Library (2nd floor building Ee)

21. Medical Library Erasmus MC10-10-200521 Demonstration go to the home page of the Medical Library:  http://www.erasmusmc.nl/medbib http://www.erasmusmc.nl/medbib  http://www.erasmusmc.nl/bibliotheek http://www.erasmusmc.nl/bibliotheek  via Erasmus MC Intranet: click > Bibliotheek  via Erasmus MC Internet: click > Bibliotheek

22. Medical Library Erasmus MC10-10-200522