## 2 Background and Related Work
### Overview of Systematic Reviews  
[PERSON] et al. [9; 27] as well as [PERSON] et al. [2] defined a systematic review as a \"review that uses explicit, systematic methods to collate and synthesize findings of studies that address a clearly formulated question\". Thus, a systematic review focuses on a clearly formulated research question and relies on systematic, reproducible, and explicit methods to support the identification, selection, and critical appraisal of relevant research meeting some eligibility criteria as well as the collection and analysis of data retrieved from that research. A systematic review also relies on explicit, reproducible, and systematic methods that allow reducing the potential bias that may arise when identifying, selecting, synthesizing, and summarizing studies. As such, a systematic review allows synthesizing the state of knowledge of a given topic [10]. A systematic review that focuses on evidence coming from the analysis of the literature deemed relevant for a given research question/topic area is referred to as systematic literature review [26]. A systematic mapping study is a form of systematic review that does not aim at synthesizing the literature, but rather focuses on categorizing primary studies against a given framework/model, to identify the relevant research that has been undertaken in an area and to identify potential gaps in that research area [1]. [PERSON] et al. [4; 11], [PERSON] et al. [10] and [PERSON] et al. [9] stated that a systematic review can have several stakeholders (end-users) for which it yields different types of knowledge. Each of these stakeholders has specific interests in the systematic review and needs to know the actions they must perform based on the findings of a given review of a set of interventions. As [PERSON] et al. [2], [PERSON] et al. [8], [PERSON] et al. [20], and [PERSON] et al. [28] pointed out, systematic reviews are crucial to such stakeholders for several reasons including the following ones:  
* By synthesizing the state of knowledge in a given field, systematic reviews allow identifying future research priorities, challenges, and directions without overwhelming the reader with a high volume of research. * Systematic reviews serve as a basis of major practice and policy decisions and can address research questions for which individual studies have no answer. * Unlike ad hoc search, systematic reviews allow minimizing subjectivity and bias, and therefore provide a higher degree of confidence regarding their coverage of the relevant studies included in the review and the credibility of their findings. * Systematic reviews allow evaluating the trustworthiness as well as the applicability of the results they synthesize, and allow replicating or updating reviews. To plan, conduct and report a systematic review, systematic reviewers can rely on a reporting guideline. A reporting guideline is _\"a checklist, flow diagram, or explicit text to guide authors in reporting a specific type of research, developed using explicit methodology\"_[29]. When systematic reviewers rely on up-to-date reporting guidelines, it helps them report a review in a transparent, complete, and accurate way, and therefore ensures that the review they are conducting is valuable to its users [2]. Besides, completing systematic reviews can be a very daunting task that a reporting guideline can help alleviate by providing rigorous methodological guidance [30]. Based on the EQUATOR (Enhancing the QUAlity and Transparency Of health Research) Network registry ([[https://www.equator-network.org/library/reporting-guidelines/underdevelopment/](https://www.equator-network.org/library/reporting-guidelines/underdevelopment/)]([https://www.equator-network.org/library/reporting-guidelines/underdevelopment/](https://www.equator-network.org/library/reporting-guidelines/underdevelopment/)) (accessed on 14 August 2022)), there are currently more than 529 reporting guidelines. Some of these guidelines, e.g., PRISMA, can be used to conduct and write systematic reviews.