The quality of evidence for medical interventions does not improve or worsen: a metaepidemiological study of Cochrane reviews

Howick, Jeremy ; Koletsi, Despina ; Pandis, Nikolaos ; Fleming, Padhraig S. ; Loef, Martin ; Walach, Harald ; Schmidt, Stefan ; Ioannidis, John P.A.

Journal of clinical epidemiology, 2020-10, Vol.126, p.154-159 [Periódico revisado por pares]

United States: Elsevier Inc

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