Description of use among study participants.
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数据链接：
官方服务：
资源简介：
*197 (82%) households present at the time of visit; 183 (93%) of them were still in possession of the filter and ever used it. **203 (85%) households present at the time of visit; 192 (94%) of them were still in possession of the filter and ever used it + answer missing for 2 households.
创建时间：
2010-09-10
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