They showed that within the "giant duiker" group, the bay duiker formed a clade with Jentink's duiker, and the zebra duiker is sister to this clade. Similarly, Abbott's duiker and yellow-backed duiker form a clade sister to Sylvicapra.
The study found that within the "giant duiker" group, the bay duiker forms a clade with Jentink's duiker, while the zebra duiker is closely related to this clade.  Abbott's duiker and yellow-backed duiker form a separate clade sister to Sylvicapra.