title: [Effect of tobacco smoking on vitamin B 12 level in man's blood serum].
mesh_terms: D000328:Adult; D003864:Depression, Chemical; D006801:Humans; D008297:Male; D008875:Middle Aged; D009538:Nicotine / Q000494:pharmacology; D012907:Smoking; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D009538:Nicotine; D014805:Vitamin B 12
vernacular_title: Wpływ palenia tytoniu na poziom witaminy B12 w surowicy u ludzi