Sentence examples for papers were checked for from inspiring English sources

The final 68 papers were checked for duplicate studies.

Reference lists of relevant papers were checked for additional studies.

The references of identified papers were checked for related articles.

Reference lists of included papers were checked for further potentially eligible studies.

The bibliographies of relevant papers were checked for further relevant studies.

Reference lists of included papers were checked for further potentially relevant citations.

In addition, the final included papers were checked on PubMed for retractions and errata.

Asked if ballot papers were checked to ensure votes had not been erased and altered, the spokeswoman said all votes were verified and checked for spoiled ballots.

All the papers were checked by investigators before adoption.

The reference lists of the papers retrieved were checked for includable papers as were the "related articles" facility in PubMed.

In addition to the database search, the lists of references of all papers included were checked for eligible articles.