Whats does d mean in a journal citation?

Question

I would like to cite a journal and I was hoping to find page numbers, instead it is formatted like this:

BMJ. 2011; 343: d5094.

Does the 'd' indicate the page or something else?

Answer 1

This is the doi number

DOI stands for "Digital Object Identifier"

Here's a BMJ citation guide

Template:
1 Author Surname Author Initial. Title. Publication Title Year Published;Volume number:Pages Used. doi:DOI Number

So your citation is for:
Publication: BMJ
Year: 2011
Volume: 353
Digital Object Identifier: 5094