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Agreement of treatment effects for mortality from routinely collected data and subsequent randomized trials: meta-epidemiological survey Lars G Hemkens. Despina G Contopoulos-Ioannidis. John P A Ioannidis. BMJ.
Source: www.bmj.com
g bmj meta-epidemiological contopoulos-ioannidis ioannidis despina hemkens lars