PMC:4144696 / 6175-6400 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/4144696","sourcedb":"PMC","sourceid":"4144696","source_url":"https://www.ncbi.nlm.nih.gov/pmc/4144696","text":"This was a cross-sectional, population-based survey using face-to-face structured interviews administered by trained interviewers. It was conducted by unannounced visits to households, with multistage random cluster sampling.","tracks":[]}