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References

  • 1
    Belanger K, Buka S, Cherry DC, Dudley DJ, Elliott MR, Hale DE, et al. Implementing provider-based sampling for the National Children's Study: opportunities and challenges. Paediatric and Perinatal Epidemiology 2012 Sept 27 [Epub ahead of print].
  • 2
    Olsen J. Random sampling – is it worth it? Commentary to Belanger et al. Implementing provider-based sampling for the National Children's Study: opportunities and challenges. Paediatric and Perinatal Epidemiology. In press.
  • 3
    Savitz DA, Ness RB. Saving the National Children's Study. Epidemiology 2010; 21:598601.