1.4 method to collect data.Data collection in this research, the researcher collected data, risk areas of Bangkok by the first step. Send details research project. To offer the human research ethics committee of the Faculty of Health Sciences, Mahidol University for certification of ethics in humans. The research will have collected data for further research Then the synchronization with the owner of one of the 1 risk area of Bangkok. For that purpose and request assistance in research, the data service ladies vulnerable areas. Collect the data manually. And select the qualified as selection criteria samples. The researcher to explain the details to the participants were aware of the reason in research at this time. Explain the details in the query. And let them know about the personal information is not revealed. After the data information to research participants. The researcher should sign a written Data was collected using questionnaires to participants the answer. The cooperation in answering the questionnaire as well. So the data in this study are appropriate. But this study may not be representative of the population. Notice that the participants were to be a risky behavior.
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