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2. A procedure for objective respondent selection within the household;Kish;J Am Stat Assoc,1949
3. A minimally intrusive method for sampling persons in random digit dial surveys;Rizzo;Public Opin Q,2004
4. American Association of Public Opinion Research (AAPOR) [homepage on the Internet]. Survey Methods, Standards and Best Practices. Available from: http://www.aapor.org/standards.asp. Accessed February 12, 2007.
5. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 4th ed. DSM-IV-TR. Washington, DC: American Psychiatric Association; 2000.