Ключевые слова: background, black, blue, book, cardiology, care, clean, closeup, device, diagnose, diagnosis, diagnostic, disease, emergency, equipment, exam, examination, health, healthy, hear, heartbeat, hospital, illness, instrument, listen, lung, measurement, medical, medicine, metal, nurse, page, paper, pulse, research, science, scientific, sterile, stethoscope, technology, test, tool, treatment, wellness,