Audiology is a challenging and expanding field involving the study of hearing and balance. As a healthcare profession, audiology also involves assessment, management and therapeutic rehabilitation of people with hearing and balance problems, and associated disorders.
The cause of death was a heart attack, the Pittsburgh Steelers said. Webster played center for 15 seasons (1974-88) for the Steelers and two seasons (1989-90) for the Kansas City Chiefs. In 1997, he was inducted into the Pro Football Hall of Fame in Canton, Ohio, and in 2000 he was named to the National Football League's all-time team.
Doctors diagnosed the 63-year-old Hall of Fame offensive lineman with the disease just four days earlier. Upshaw was a guard for the Oakland Raiders from 1967 to 1981. He played in seven Pro Bowls and three Super Bowls. He served as head of the NFL player's union for 25 years.