Challenges of emerging countries: a relatively positive view for the future.

Rev Bras Hematol Hemoter · 2012 · PMC3459626 · PMID 23049410

Europe PMC DOI

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may be significantno p-value reported

Additionally, the financial reward for participation may be significant compared to the salaries of research subjects and of course there is the lack of reviewing by ethics committees etc..

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.