title: How Credible Are Meta-Analyses of Risk Factors Based on Observational Studies for Amyotrophic Lateral Sclerosis A New Insight from an Umbrella Review.
authors.affiliation: School of Life Science, Changchun Normal University, Changchun, Jilin, China.
authors.forename: Ming-Dong
authors.initials: MD
authors.lastname: Wang
authors.forename: Julian
authors.initials: J
authors.lastname: Little
mesh_terms: D006801:Humans; D000690:Amyotrophic Lateral Sclerosis / Q000453:epidemiology / Q000209:etiology; D015201:Meta-Analysis as Topic; D064887:Observational Studies as Topic; D015203:Reproducibility of Results; D012307:Risk Factors; D000078202:Systematic Reviews as Topic