Ad

11:07 Mar 2, 2015 

So, are the Dnr and Ad numbers in the text cited in the question identical?

09:44 Mar 2, 2015 

I always leave home-made abbreviations as they are; possibly with a hint to the client who then has the option of providing a list of definitions.

23:17 Mar 1, 2015 

The format of the numerals and the numerals themselves are altogether wrong to be a date.

22:42 Mar 1, 2015 

What do xxxx-xx refer to? A date?

22:40 Mar 1, 2015 

I should have mentioned that the same number appearing after the term/abbreviation "Ad" also appears in the first sentence below table data covering the nature of the request, protocol code and title, EudraCT number and name of sponsor. The text of this sentence, when translated, reads as follows:

"This clinical trial was approved by the regional ethical review board in [name of region] in a letter dated [dd month yyyy], with your reference number XXXX-XX." (Same as "Ad" number.)