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Informed consent was obtained from all patients for being included in the study.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"Our research protocol was approved under the number ESP\/CE\/008\/2015 by the National Ethical Committee of the Public Health School of the University of Kinshasa, Kinshasa, DR Congo.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"The authors declare that they have no conflict of interest.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}