Who is Harvey Kelekian, M.D. in the play, Wit?

Doctor Kelekian is an oncologist. He is the same age as Vivian and they can relate to each other on the topic of modern university students. The doctor cares about his patients, yet he also understands the value of research for the larger good. He has no qualms asking Vivian to go through a rigorous experimental treatment even though there is no chance she will benefit from it. He shows Vivian kindness near the end by offering her morphine.