Gumz, A., Brahler, E., Geyer, M., Erices, R. (2012): BMC Medical Research Methodology 2012, 12:10 doi:10.1186/1471-2288-12-10. ISSN 1471-2288
201201Gumz, A., Brahler, E., Geyer, M., Erices, R. (2012): BMC Medical Research Methodology 2012, 12:10 doi:10.1186/1471-2288-12-10. ISSN 1471-2288
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