Still, to this day, researchersㅡamong them (being) Robert Jarvikㅡare convinced~

Three years later, the Jarvik heart, as it came to be called, was implanted in the body of Barrey Clark, a retired dentist dying of heart disease. Clark lived for 112 days after the surgery, and his survival raised hopes for the future success of artificial hearts. But, by 1985, it was clear that artificial-heart patients were prone to fatal strokes and infections. Still, to this day, researchers?among them Robert Jarvik?are convinced that artificial heart transplants will one day be successful.
[Source: Reading for Results Ninth Edition by Laraine Flemming]
I'd like to know if I can regard "among them Robert Jarvik" as "among them (being) Robert Jarvik."
Thank you in advance for your help.