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Online focus groups as a tool to collect data in hard-to-include populations: examples from paediatric oncology

Kiek Tates*, Marieke Zwaanswijk, Roel Otten, Sandra van Dulmen, Peter M Hoogerbrugge, Willem A Kamps and Jozien M Bensing

BMC Medical Research Methodology 2009, 9:15  doi:10.1186/1471-2288-9-15

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