title: Studies on vitamin B 12  and folic acid absorption in patients with opisthorchis infection.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003036:Cobalt Isotopes; D005260:Female; D005492:Folic Acid / Q000378:metabolism*; D006801:Humans; D007408:Intestinal Absorption; D007411:Intestinal Diseases, Parasitic / Q000378:metabolism; D008297:Male; D008722:Methods; D008875:Middle Aged; D009889:Opisthorchiasis / Q000453:epidemiology / Q000378:metabolism*; D013785:Thailand; D014316:Tritium; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D003036:Cobalt Isotopes; D014316:Tritium; D005492:Folic Acid; D014805:Vitamin B 12