An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Richards D, Lawrence A. Evidence based dentistry. Br Dent J 1995; 179: 270-273.
-
PubMed
Mehra M R, Desai S S, Kuy S, Henry T D, Patel A N. Retraction: Cardiovascular disease, drug therapy, and mortality in Covid-19. N Engl J Med 2020; doi: 10.1056/NEJMc2021225.
-
PMC
-
PubMed
The Lancet Editors. Expression of concern: Hydroxychloroquine or chloroquine with or without a macrolide for treatment of COVID-19: a multinational registry analysis. Lancet 2020; doi: 10.1016/S0140-6736(20)31290-3.
-
PMC
-
PubMed
Chalmers I, Glasziou P. Avoidable waste in the production and reporting of research evidence. Lancet 2009; 374: 86-89.
-
PubMed
Pandis N, Fleming P S, Worthington H, Salanti G. The quality of the evidence according to GRADE is predominantly low or very low in oral health systematic reviews. PLoS One 2015; doi: 10.1371/journal.pone.0131644.
-
PMC
-
PubMed