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Logo of bmcmrmBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Medical Research Methodology
 
From:
Published online 2012 April 4. doi: 10.1186/1471-2288-12-45

Figure 1

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Object name is 1471-2288-12-45-1.jpg

Profile of unique phone numbers called and outcome classification for survey.