What style are you using for citations? A good source of information on APA and MLA style is Purdue Owl. You can find information on citing multiple authors here https://owl.english.purdue.edu/owl/resource/560/03/.
I'm not sure what you mean by "abscesses," but I strongly suspect that you mean something else.
(ăb′sĕs′)n. A localized collection of pus in part of the body, formed by tissue disintegration and surrounded by an inflamed area.
intr.v. ab·scessed, ab·scess·ing, ab·scess·es To form an abscess.
Hope that helps,