How should I list my research affiliation on my CV if my PI is dual-appointed?

Hi all,

I’m a researcher working with a professor who has a primary academic appointment at a university (associate research professor in a medical department), but their lab is physically located at a federal research hospital. To start working there, I had to go through the federal hospital’s clearance process and was given an official “without compensation” (WOC) appointment.

On publications, my PI always lists both the university and the hospital as their affiliations. But for me, I’m not sure what to put on my CV/resume.

• On one hand, my official appointment is through the hospital (because of the WOC).
• On the other hand, my PI’s main position is at the university, and most students in similar situations just put the university for name recognition.

If I have to pick one, which is more accurate for me to list as my research affiliation? Or is it okay to list both (e.g., “University Department of Medicine / Federal Research Hospital”)?

Would love to hear what others have done in similar dual-affiliation situations.