Research
Current use of routinely collected health data to complement randomized controlled trials: a meta-epidemiological survey
Lars G. Hemkens, Despina G. Contopoulos-Ioannidis and John P.A. Ioannidis
April 06, 2016 4 (2) E132-E140; DOI: https://doi.org/10.9778/cmajo.20150036