Table 1 Characteristics of the included systematic review and meta-analysis
- Co Cochrane Library, DB databases, EM EMBASE, GL gray literature, PM PubMED/Medline, RG registers, SC Scopus, Wo Web of Science
-
favors intervention;
favors comparison;
no differences between groups; ◙ broader, 
exact, ◔ narrow - aGray literature, ❶, ❷, ❸, ❹, ❺, ❽, ❿ years of follow-up
favors intervention;
favors comparison;
no differences between groups; 
exact,