ISBN-13: 9783319256535 / Angielski / Twarda / 2016 / 391 str.
ISBN-13: 9783319256535 / Angielski / Twarda / 2016 / 391 str.
� This book is an ideal guide to umbrella reviews, overviews of reviews, and meta-epidemiologic studies for evidence synthesis. Research is conducted at different levels: primary research consists of original studies while secondary research comprises qualitative reviews, systematic reviews, and meta-analyses.