Protocol for a systematic review on the extent of non-publication of research studies and associated study characteristics

por Portalupi, Susan, von Elm, Erik, Schmucker, Christine, Lang, Britta, Motschall, Edith, Schwarzer, Guido, Gross, Isabel T, Scherer, Roberta W, Bassler, Dirk, Meerpohl, Joerg J
Publicado 2013

A protocol for a systematic review on the impact of unpublished studies and studies published in the gray literature in meta-analyses

por Schmucker, Christine, Bluemle, Annette, Briel, Matthias, Portalupi, Susan, Lang, Britta, Motschall, Edith, Schwarzer, Guido, Bassler, Dirk, Mueller, Katharina F, von Elm, Erik, Meerpohl, Joerg J
Publicado 2013

Extent of Non-Publication in Cohorts of Studies Approved by Research Ethics Committees or Included in Trial Registries

por Schmucker, Christine, Schell, Lisa K., Portalupi, Susan, Oeller, Patrick, Cabrera, Laura, Bassler, Dirk, Schwarzer, Guido, Scherer, Roberta W., Antes, Gerd, von Elm, Erik, Meerpohl, Joerg J.
Publicado 2014