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ACM Trans Knowl Discov Data. Author manuscript; available in PMC 2010 Jan 12.
Published in final edited form as:
ACM Trans Knowl Discov Data. 2009 Jul 1; 3(3): 11.
doi: 10.1145/1552303.1552304
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Fig. 1

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Presence of affiliations, email addresses and full first names in MEDLINE records as a function of publication date. The affiliations have been included (when available) since ~1988, most often containing the affiliation of the first-listed author or corresponding author only. Email addresses, although rarely available, have been included in the affiliation field since ~1995. Full first names have been included (when available) since 2002. Note that some first names and emails were extracted from bibliographic sources other than MEDLINE (see Results).

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