Additional/Supplementary material for the article, "Measles Outbreak Investigation Process in Low- and Middle-Income Countries (LMICs): A Systematic Review of the Methods and Costs of Contact Tracing"

Additional File 1: PRISMA Checklist This word document is a completed PRISMA checklist that outlines how the implementation of this systematic review conforms with the stipulated guidelines. Additional File 2: Article Search Strategy This file (excel workbook) provides details on how the keywords were applied and the Boolean operators used in combining them during the article search process for each database. Additional File 3: Article Selection Summary This excel workbook provides a summary of the article selection process showing how the inclusion and exclusion criteria were applied when reviewing the title, abstract and full-text of articles obtained from each database search. Also, the number of duplicates and articles resulting from hand searches have been included. Additional File 4: Study Selection Process for each Database Search results exported from each of the six databases are presented from Table 1 to Table 6 (each table on a separate excel sheet of the workbook). The date on which these searches were done together with reviewers’ decisions have been incorporated. Additional File 5: Main Characteristics of Selected Studies The characteristics of the selected studies are presented in Table 1 (studies on methods of contact tracing) and Table 2 (studies on economic costs of contact tracing) on two separate excel sheets of a workbook. Additional File 6: Quality Assessment of Included Studies Grouped by Type of Design. Details of how each quality assessment tool was applied to each study have been provided in Tables 1 to 4 (on four separate excel sheets of a workbook), each table containing studies of the same design. Additional File 7: Risk of Bias Assessment This excel workbook contains the assessment of bias (selection, information and confounding) across the studies included for this review.