title: [Seasonal variations in the incidence of inflammatory changes and ulcers of the stomach and duodenum in endoscopic examinations].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004381:Duodenal Ulcer / Q000473:pathology*; D004382:Duodenitis / Q000473:pathology*; D004384:Duodenoscopy; D005260:Female; D005756:Gastritis / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D012621:Seasons; D013276:Stomach Ulcer / Q000473:pathology*
vernacular_title: Zmienność okołoroczna wystepowania zmian zapalnych i wrzodów zoładka i dwunastnicy w badaniach endoskopowych.