Dr. Baruch Blumberg of the National Institutes of Health (NIH) identifies a substance on the surface of the hepatitis B virus that triggers the production of antibodies.

国立卫生研究院（NIH）的巴鲁克•布伦伯格博士发现了在乙肝病毒表面能触发产生抗体的物质。

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The Salt Lake Tribune reports the man was charged Tuesday with two third-degree felony charges of child endangerment and one class B misdemeanor accusing him of possession of a controlled substance.

FORBES: Kids Turn in Dad for Marijuana Possession

However, a vitamin B-12 deficiency is most often due to a lack of a substance called intrinsic factor.

CNN: Vitamin deficiency anemia

Kallon, who is expecting the hear the results of the test on his 'B' sample very soon, denied being guilty of using a performance-enhancing substance.

BBC: SPORT | Football | African | Kallon plays for S'Leone