Study selection flow diagram (Prisma).
Search strategy.
Mesh terms are underlined.
Characteristics of included reviews.
Characteristics of included primary studies.
TG=test group; CG=control group.
Results from systematic reviews and primary studies.
© 2012 Maja Lopez Hartmann, Johan Wens, Veronique Verhoeven, Roy Remmen, published by Igitur, Utrecht Publishing & ArchivingThis work is licensed under the Creative Commons Attribution 4.0 License.