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тяжёлое заболевание stresses
gen.	devastating disease (AlexandraM)
health.	disabling condition (Crow Jane)
med.	serious disease (Andy); severe disease (capricolya); critical illness (Vadim Rouminsky)
тяжёлые заболевания
med.	serious diseases (Азери)

тяжёлые заболевания: 12 phrases in 4 subjects

Makarov	3
Medical	7
Psychiatry	1
Vulgar	1