title: Duration of smoking and quantity of tobacco used by patients with gastric cancer.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010947:Plants, Toxic; D012737:Sex Factors; D012907:Smoking / Q000150:complications*; D013274:Stomach Neoplasms / Q000139:chemically induced*; D013997:Time Factors; D014026:Nicotiana