Prompt
Create a realistic portrait of Roger Guillemin, a French-American neuroendocrinologist and physiologist, sitting in a laboratory setting with a subtle background of scientific equipment, wearing a white lab coat, and holding a notebook and pen, with a warm and introspective expression, conveying his dedication to his work and groundbreaking research in the field of neurohormones and hypothalamic hormones, for which he was awarded the Nobel Prize in Physiology or Medicine in 1977.