[Theoretical explanation of seasonal fluctuations in some chronic diseases of the digestive tract].
D002908:Chronic Disease; D005767:Gastrointestinal Diseases; D006801:Humans; D010507:Periodicity; D012621:Seasons
GASTROINTESTINAL DISEASES/manifestations; PERIODICITY
Erklärungstheorie der Saisonerscheinungen bei manchen chronisch verlaufenden Erkrankungen des Verdauungssystems.