[Concept and research strategy in quality of life studies in gastroenterology (review)].
Novik
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AA
Ionova
T I
TI
Denisov
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NL
D005762:Gastroenterology; D005767:Gastrointestinal Diseases / Q000503:physiopathology* / Q000628:therapy; D006801:Humans; D010043:Outcome and Process Assessment, Health Care; D017060:Patient Satisfaction; D011788:Quality of Life; D012107:Research Design; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires