â¤0.2 mg/dL. Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstruction. The assessment of direct bilirubin is helpful in the differentiation of hepatic disorders.
Ritchie Valens. In an all too brief career, Ritchie Valens was the first Chicano rock and roll star, having his best remembered hit, La Bamba, just one month before his untimely death with Buddy Holly and the Big Bopper on February 3, 1959.
Stars killed in plane crashes. It went down in history as they day the music died. On Feb. 3, 1959, music legends Ritchie Valens, Buddy Holly and J.P. 'The Big Bopper' all died when their plane crashed in Iowa. Whether it was down to engine failure, technical malfunctions or pilot errors, take a look back at aviation disasters that claimed the lives of Hollywood's biggest stars.