Collecting data by telephone from low-income African Americans
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PII: S0897-1897(07)00053-5
doi:10.1016/j.apnr.2007.04.001
© 2007 Elsevier Inc. All rights reserved.
PII: S0897-1897(07)00053-5
doi:10.1016/j.apnr.2007.04.001
© 2007 Elsevier Inc. All rights reserved.