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美国医生认为口服钴胺(Cobalamin)治疗恶性贫血价格便宜而有效。据英国国家处方集描述,口服维生素B_(12)对通常因吸收不良而引起的维生素B_(12)缺乏的作用甚微,这种观点在美国也被广泛承认。故
American doctors believe that Cobalamin is cheap and effective in the treatment of pernicious anaemia. According to the British National Formulary, oral vitamin B12 has little effect on vitamin B12 deficiency, which is usually caused by malabsorption. This view is also widely recognized in the United States. So