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Petropoulou, Maria; Nikolakopoulou, Adriani; Veroniki, Areti-Angeliki; Rios, Patricia; Vafaei, Afshin; Zarin, Wasifa; Giannatsi, Myrsini; Sullivan, Shannon; Tricco, Andrea C; Chaimani, Anna; Egger, Matthias; Salanti, Georgia (2017). Bibliographic study showed improving statistical methodology of network meta-analyses published between 1999 and 2015. Journal of clinical epidemiology, 82, pp. 20-28. Elsevier 10.1016/j.jclinepi.2016.11.002
