3Rasmussen SA,Fernhoff PM,Scanlon KS. VitaminB12 deficiency in childre and adolescents[J].Journal of Pediatrics,2001,(01):10-17.doi:10.1067/mpd.2001.112160.
4Serin E,Gumurdulu Y,Ozer B. Impact of Helicohacter pylori on the development of vitaminB12 deficiency in the absence of gastric atrophy[J].Helicnbacter,2002,(06):337-341.doi:10.1046/j.1523-5378.2002.00106.x.
5Hash RB,Sargent MA,Katner H. Anemia secondary to combined deficiencies of iron and cobalamin[J].Archives of Family Medicine,1996.585-588.doi:10.1001/archfami.5.10.585.