SciELO Brazil pid -> doi translation appears inconsistent.

[jhpoelen]

for some SciELO Brazil BHL publications, the pid appears in the doi as is . . .

http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0031-10492002001300001

has doi:

https://doi.org/10.1590/S0031-10492002001300001

however, for:

http://www.scielo.br/scielo.php?script=sci_pdf&pid=S2236-89062016000300517

the doi appears to be:

https://doi.org/10.1590/2236-8906-65/2016

In other words, the current DOI inference does not apply to some SciELO Brazil publications, rendering the doi inference trick unreliable.

fyi @myrmoteras