New England Journal of Medicine
Journal Details
Publisher:
Massachusetts Medical Society
Articles
Publications included in this journal
Concato,
John,
Shah,
Nirav,
Horwitz,
Ralph I.
(2000):
Randomized, Controlled Trials, Observational Studies, and the Hierarchy of Research Design.
In
New England Journal of Medicine,
342
(25)
pp. 1887-1892.
https://www.nejm.org/doi/full/10.1056/NEJM200006223422507