Erratum to: Using text mining for study identification in systematic reviews: a systematic review of current approaches

* Correspondence: j.thomas@ioe.ac.uk Evidence for Policy and Practice Information and Coordinating EPPI-Centre, Social Science Research Unit, Institute of Education, University of London, London, UK The National Centre for Text Mining and School of Computer Science, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester M1 7DN, UK Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511, Japan