Are more Observational Studies Being Included in Cochrane Reviews?

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@article{423e36a5e5b64ab0ace472fe486d78c0,

title = "Are more Observational Studies Being Included in Cochrane Reviews?",

author = "H.C. Kongsted and Merete Konnerup",

year = "2012",

doi = "10.1186/1756-0500-5-570",

language = "English",

volume = "5",

journal = "BMC Research Notes",

issn = "1756-0500",

publisher = "BioMed Central",

number = "570",

}