@article{90d58c8637e3433b9b974c4a10ea3f9b,
title = "Can observational studies ever replace the randomized clinical trial (RCT)? The case of coronary bypass surgery with the internal mammary artery (IMA) graft",
author = "William Henderson and Tom Mortiz and Steve Goldman and Jack Copeland and Gulshan Sethi",
year = "1990",
month = aug,
doi = "10.1016/0197-2456(90)90054-6",
language = "English (US)",
volume = "11",
pages = "259",
journal = "Controlled Clinical Trials",
issn = "0197-2456",
publisher = "Elsevier B.V.",
number = "4",
}