Do pragmatic trials trade-off internal validity for external validity?

Autor:	Kirsty Loudon, Zwarenstein M, Sullivan F, Donnan P, Treweek S
Zdroj:	Europe PubMed Central
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::742db8266e06c2f6881357b656d1d9f6 http://europepmc.org/abstract/PMC/PMC4658673 Zobrazit plný text záznamu