Amorim, Jane Auxiliadora Incidência e fatores associados à cefaléia pós-punção...
can also be used, and the output will be used were possible but displayed equations may
occasionally be rekeyed by out typesetters.
Figures
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Full details of submission of manuscripts and artwork are available at
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PROOFS
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OFFPRINTS
Authors will be provided with electronic offprints of their article. Paper offprints may be ordered at
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ONLINEEARLY
Cephalalgia is covered by Blackwell Publishing's OnlineEarly service. OnlineEarly articles are
complete full-text articles published online in advance of their publication in a printed issue. Articles
are therefore available as soon as they are ready, rather than having to wait for the next scheduled
print issue. OnlineEarly articles are complete and final. They have been fully reviewed, revised and
edited for publication, and authors' final corrections have been incorporated. Because they are in
final form, no changes can be made after online publication. The nature of OnlineEarly articles
mean that they do not yet have volume, issue or page numbers, so OnlineEarly articles cannot be
cited in the traditional way. They are therefore given a Digital Object Indentifier (DOI), which
allows the article to be cited and tracked before it is allocated to an issue. After print publication,
the DOI remains valid and can continued to be used to cite and access the article. More information
about DOIs can be found at http://www.doi.org/faq.html