Ключевые слова: adult, analysis, anxiety, beard, caucasian, clinical, close up, concern, development, discovery, experiment, eyes, face, glasses, healthcare, indoor, innovation, job, lab coat, laboratory, looking, male, man, medical, medicine, necktie, nervous, occupation, one person, portrait, pressure, professional, research, researcher, science, scientific, scientist, serious, stressed, sweat, technology, tension, uniform, work, worried,