Ключевые слова: abstract, ache, assessment, background, chart, color, concept, emoji, emoticon, emotion, expression, face, feedback, flat, happy, health, high, hospital, human, hurt, icon, illness, illustration, isolated, level, low, measurement, medical, medicare, meter, mild, orange, pain, pain scale, physical, rating, red, round, scale, science, score, set, severe, sign, smiley, stress, symbol, worst, yellow,