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.
When he was sixteen years old, Ritchie Valens was invited to join a local band named The Silhouettes as a guitarist, and, when the main vocalist left the group, Ritchie assumed this position, and, on October 19, 1957, Valens made his performing debut with the Silhouettes.