Seasonal periodicity in gastroduodenal ulcers.
Tulassay
Z
Z
Papp
J
J
Lengyel
G
G
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer; D010507:Periodicity; D012621:Seasons