Dear
Appreciate your kind response. Here are the guidelines for their Reference styles. They enlisting it for the end note users on this link:
https://us.sagepub.com/en-us/nam/journal/acta-radiologica#ReferenceStyle.
However, I am a Zotero fan. hope this would be beneficial.
Regards

Dear
I appreciate your kind offer to help. I got two emails addressing the issue of reference styles after I used the Acta pathologica and AJR from Zotero repository as I felt they are the nearest to it yet both didn't work.
Here are the comments.
"9) Reference list
- Only 3 authors can be named, if more delete the rest and add "et al."
- There should always be a period after the number of the ref. in the list.
- There should be a period after the name of last author/et al., not a colon."
"The reference list needs your attention and must be corrected to be in accordance with our guidelines:
- There should be no period after the name of the journal.
- Remove reference to issue.
- Ref. to the last page must be written in full.
- Write e.g. ref. 1 as: "...2001;7: 223-234." Revise all refs. accordingly.
- Remove "AJR", write "Am j Roentgenol" only."
Also I quote their reference styles from their instructions to the author section as follows:
" References
References should follow the Vancouver format. In the text they should appear as numbers starting at (1) within parentheses. At the end of the paper they should be listed (double-spaced) in numerical order corresponding to the order of citation in the text. All authors should be quoted for papers with up to three authors; for papers with more than three authors, list the first three followed by 'et al.'. Abbreviations for titles of medical periodicals should conform to those used in the latest edition of Index Medicus. The first and last page numbers for each reference must be provided. This applies to all published material including textbooks. The year followed by ";", volume followed by ":" and the pages; the issue should not be mentioned. Abstracts and letters must be identified as such. The DOI number should be listed for articles that have been accepted for publication but have not yet been.

Hope these would be satisfactory and thank you in advance.

Can you please adapt the exact two references by Campbell and Mares to exactly match the style (and not the Balg and Burkhart). Please read the instructions again ;)

Yes, the examples and instruction are clear. I think that it is clear on both sides. Here are any rules (suggestions) for requesting new styles, which spent the time of volunteers, who develops the styles. If you do not provide described information, then your request will get low priority. That's all.