Systematic reviews and meta-analyses that include registry-based studies: methodological challenges and areas for future research

Affiliations

• ¹ Institute for Medical Statistics, University Medical Center Goettingen, Humboldtallee 32, 37073, Goettingen.
• ² Institute for Medical Statistics, University Medical Center Goettingen, Humboldtallee 32, 37073, Goettingen. Electronic address: zhentian.zhang@med.uni-goettingen.de.
• ³ Faculty of Health Sciences Brandenburg, Brandenburg Medical School (Theodor Fontane), Institute for Health Services and Health System Research, Rüdersdorf, Germany; Center for Health Services Research, Brandenburg Medical School (Theodor Fontane), Rüdersdorf, Germany.