URL Address

 Access

 Company Name

 Name of Electronic Resource

/https://www.sciencedirect.com

Elsevier

ScienceDirect

https://onlinelibrary.wiley.com/

John Wiley & Sons

Wiley

https://link.springer.com/ 

Springer

Springer

http://ovidsp.dc2.ovid.com

Wolter Kluwer

OVID

https://search.proquest.com/index

ProQuest

ProQuest

https://www.clinicalkey.com/

Elsevier

Clinical Key

https://journals.bmj.com/content/journals

BMJ

BMJ Journals

https://journals.sagepub.com/ 

SAGE

SAGE Journals

https://www.nejm.org/

ProQuest

The New England Journal of Medicine (NEJM)