Fig. 1
From: The efficacy of XEN gel stent implantation in glaucoma: a systematic review and meta-analysis
PRISMA 2009 flow diagram. The search strategy for this meta-analysis yielded 725 publications, and 429 studies were excluded because of duplication. After reading the titles and abstracts, 57 studies were excluded. Two hundred and thirty-nine possible full-text studies were carefully reviewed (Animal study [n = 4]; Case report [60]; Letter and Response [n = 8]; Review and meta-Analysis [n = 64]). Finally, 78 trials were included for quantitative analysis