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Fayers, P.M., King, M. A highly significant difference in baseline characteristics: the play of chance or evidence of a more selective game?. Qual Life Res 17, 1121–1123 (2008). https://doi.org/10.1007/s11136-008-9390-x
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DOI: https://doi.org/10.1007/s11136-008-9390-x