@article{337057e7c08042e2ab7b8509514d0237,
title = "Differences in interaction and subgroup-specific effects were observed between randomized and nonrandomized studies in three empirical examples",
keywords = "Econometric and Statistical Methods: General, Geneeskunde (GENK), Geneeskunde(GENK), Medical sciences, Bescherming en bevordering van de menselijke gezondheid",
author = "A.F. Schmidt and M.M. Rovers and O.H. Klungel and A.W. Hoes and M.J. Knol and M. Nielen and \{de Boer\}, A. and R.H.H. Groenwold",
year = "2013",
doi = "10.1016/j.jclinepi.2012.08.008",
language = "English",
volume = "66",
pages = "599--607",
journal = "Journal of Clinical Epidemiology",
issn = "0895-4356",
publisher = "Elsevier",
number = "6",
}