Missing data were replaced so that they can be used in the test. And some of the data that could not be used straight, has made adjustments to the prior to be used in research, for example, in some cases, that the post has not been filled in, you can put make in entering information into the database, it cannot be applied in the research. Researchers have made changes to the data as "anonymous" information so that they can continue to conduct research and also provides information on the privacy of individuals is a specific. Researchers do not have a wide range of applied level of the district and sub-district levels of information that exist within the country only.
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