Professional and academic profile of the Brazilian research ethics committees.

Background: Brazil is among the sixteen countries that conducts the most clinical trials in the world. It has a system to review research ethics with human beings made up by the National Commission on Research Ethics (CONEP) and 779 Research Ethics Committees (RECs), in 2017. The RECs are supposed to follow the same rules regarding their membership, although the RECs that review Social Science and Humanities (SSH) researches must respect Resolution 510/16.