Ключевые слова: adult, awake, background, bedtime, care, caucasian, chronic, deprivation, difficulty, disease, disorder, dream, emotional, exhausted, fatigue, female, frustration, girl, grey, health, illness, insomnia, lifestyle, light, mask, medical, mental, nap, people, person, pillow, portrait, problem, rest, sad, sickness, sleep, sleeping, sleepless, sleeplessness, stress, suffering, symptoms, time, tired, tiredness, upset, woman, young,