TY - JOUR T1 - Defining the process to literature searching in systematic reviews: a literature review of guidance and supporting studies JO - BMC Medical Research Methodology UR - http://eprints.whiterose.ac.uk/134815/ PY - 2018/08/14 AU - Cooper C AU - Booth A AU - Varley-Campbell J AU - Britten N AU - Garside R ED - DO - DOI: 10.1186/s12874-018-0545-3 PB - Springer Science and Business Media LLC VL - 18 IS - 1 Y2 - 2024/09/20 ER -