Fig. 1

The flowchart of the search and selection process is presented based on the PRISMA-guidelines [18]. Comments: (*) identified through databases Ovid/Medline, Embase and Web of Science Core Collection.

The flowchart of the search and selection process is presented based on the PRISMA-guidelines [18]. Comments: (*) identified through databases Ovid/Medline, Embase and Web of Science Core Collection.