Fig. 1: Flow chart of the systematic article selection strategy.
From 19326 studies from Pubmed, and 21319 studies from Science, Cochrane and Embase identified from the search strategy, a total of 123 articles were included for review. The boxes indicate exclusions of articles during each of the following screening stages: duplicate recoeds, unrelated recos and others. Reasons for exclusion are shown inside the right boxes. The box at bottom indicates inclusion articles.
