Missing data A systematic review of how they are reported and handled
By I. Eekhout, M.R. de Boer, J.W. Twisk, H.C.W. de Vet and M.W. Heijmans
Year: 2012
DOI identifier: 10.1097/EDE.0b013e3182576cdb
OAI identifier:
oai:dare.ubvu.vu.nl:1871/41713
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