SciELO - Scientific Electronic Library Online

SciELO - Scientific Electronic Library Online

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SILVA-JUNIOR, Ariovaldo Alberto da et al. Relative frequency of headache types: a longitudinal study in the tertiary care. Arq. Neuro-Psiquiatr. [online]. 2010, vol.68, n.6, pp. 878-881. ISSN 0004-282X.  http://dx.doi.org/10.1590/S0004-282X2010000600009.

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