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., Norman, R. J., Davies, M. J., et al.: The effect of obesity on polycystic ovary syndrome: a systematic review and meta-analysis. Obes. Rev., 2013, 14 (2), 95–109. 10

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947 955 Glass, G. V. 1976. Primary, secondary and meta-analysis of research. Educational Researcher 5: 3-8. Primary, secondary and meta-analysis of

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L, Li S, et al. Effects of SGLT2 inhibitors on UTIs and genital infections in type 2 diabetes mellitus: a systematic review and meta-analysis. Sci Rep. 2017; 7: 2824. 5

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–2), 29–38. Wojciechowski, P., Lipowska, A., Rys, P., et al.: Impact of FTO genotypes on BMI and weight in polycystic ovary syndrome: a systematic review and meta-analysis. Diabetologia, 2012, 55 (10), 2636

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with convalescent serum. Meta-analysis of studies showed that passive immunization reduced mortality by Ebola pandemic [ 22 ]. Passive immunization has been used in America, Asia, Africa and Europe since any infectious disease outbreak. The response of

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with convalescent serum. Meta-analysis of studies showed that passive immunization reduced mortality by Ebola pandemic [ 22 ]. Passive immunization has been used in America, Asia, Africa and Europe since any infectious disease outbreak. The response of

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topic ( Almadi, 2019 ): it is actual and significant because among other leadership interventions, it showed the greatest impact on leadership improvement and such organizational outcomes as follower job performance, in a recent meta-analysis ( Avolio

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, 19–26. Nagy Z., Varga P., Kovács L. et al.: Cavinton metaanalysis (In Hungarian). Praxis, 1998, 7 , 63–68. Kovács L

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Orvosi Hetilap
Authors: Valentin Brodszky, Katalin Farkas, Zoltán Járai, Anna Landi, Zsolt Pécsvárady, Petra Baji, Orsolya Balogh, László Gulácsi, and Márta Péntek

.: Meta-analysis of randomised controlled prostaglandin E1 studies in peripheral arterial occlusive disease stages III and IV. Vasa, 2004, 33 , 137–144. Elze M. Meta-analysis of

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Abstract  

The assumption underlying citation analysis is that the citing authors select their references in a rational manner. The present study, based on a very homogeneous collection of clinical trials from a meta-analysis, provides a partial verification of this idea: citing authors prefer large studies to smaller ones, they also seem to prefer studies representing the minority view of the research issue, perhaps in order to make their presentation more balanced. On the other hand, in this instance the inclusion of a placebo in the study design does not affect citation frequency. Furthermore, the conjecture that heuristic value is a main determinant of citability is not settled.

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