- Correspondence to Dr Wasim Maziak, Department of Epidemiology, Florida International University, 11200 SW 8th St Miami, FL 33139, USA;
- Received 15 June 2013
- Revised 9 August 2013
- Accepted 12 August 2013
- Published in print 29 August 2013.
- Published online 2 September 2013.
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