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Publication bias in situ
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Correspondence: Carl V Phillips carl.v.phillips@cphps.org
BMC Medical Research Methodology 2004, 4:20 doi:10.1186/1471-2288-4-20
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Correspondence: Carl V Phillips carl.v.phillips@cphps.org
BMC Medical Research Methodology 2004, 4:20 doi:10.1186/1471-2288-4-20