Who is Dr. Nathan from Becoming a Doctor: A Journey of Initiation in Medical School and what is their importance?

Dr. Nathan is the name of a physician who shed a tear when his long-time patient died. Konner recognized this as unusual behavior for most doctors with whom he worked and might have reminded him of his childhood physician or Uncle Bobby. Konner asked to accompany him on rounds and was appreciated. Konner noticed how much his patients believed he cared about them.