TY  - JOUR
A1  - Moher, D.
A1  - Liberati, A.
A1  - Tetzlaff, J.
A1  - Altman, D.G.
T1  - Preferred reporting items for systematic reviews and meta-analyses: The PRISMA Statement
Y1  - 2009
DO  - 10.1136/bmj.b2535
VL  - 339
IS  - 7716

ER  -