If you would like to be a co-author on this project, please demonstrate that you have sufficient knowledge and skills to progress and complete this article. Applicants with access to literature databases (Web of Science, ProQuest, EBSCO, CENTRAL) are preferred.

1. Data: observational study

2. Knowledge:

(1) search strategy/formula/term in literature databases (e.g. pubmed, scopus, embase, Cochrane Library)

(2) understanding and interpretation of primary studies (e.g. statistical methods for adjustment)

(3) extraction and entry of dichotomous data (e.g. OR, RR, HR)

(4) data analysis (e.g. pooling, heterogeneity, publication bias, risk of bias assessment, GRADE)

(5) method in case of small number of studies

(6) reinforcement of topic background for a better introduction (e.g. guideline)

3. Skills: 

(1) coding R libraries for meta-analysis

(2) alternative software