http://unesdoc.unesco.org/images/0013/001393/139309s.pdf
http://www.coe.int/t/dg3/healthbioethic/activities/02_biomedical_research_en/guide/Guide_ES.pdf
http://www.conasa.gob.ec/index.php?option=com_content&view=article&id=116&Itemid=92
https://www.healthresearchweb.org/files/Ecuador.pdf
http://www.scielo.cl/scielo.php?pid=S1726-569X2008000100012&script=sci_arttext
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