Edit: the field is cancer biology if that helps.
Not sure if this is the right place for this, but I'm in the process of seeking PI's to reach out to ahead of my applications for the Fall 2020 cycle. A PI with an area of research I'm interested in has a CV posted on the lab website, and it states that the most recent grant and publication record ended in 2013. Is this a sign of an upcoming retiree, or worse- an inactive lab? Is it appropriate to ask directly?
Thanks!