In the medical sciences, you should only use a direct quote if the exact wording is important. You should be paraphrasing the information as much as possible. When paraphrasing, it is not standard practice to use page numbers, but they can be used if you feel it is necessary for clarification.
However, if you do need to refer to the exact wording used by the authors, you must put the quote in "quotation marks" and use a page number next to the in-text citation.
You put the page number in brackets directly after the reference number, with no space: 1(p6). This all goes in superscript.
Example
Rey's support of the Mad Dog theory is equivocal, and he states "I’m not defending Mad-doggery because I believe it."3(p125)
