Osteonecrosis of the knee develops through four stages, which can be identified by symptoms and X-rays. Stage I: Symptoms are most intense in the earliest stage. Symptoms may continue for 6 to 8 weeks and then subside. Because X-rays are normal, a positive bone scan is needed to make the diagnosis.
Judy Garland 'Dorothy' died June 22, 1969. Frank Morgan 'Professor Marvel, The Gatekeeper, The Carriage Driver, The Doorman, The Wizard of Oz' died September 18, 1949. Ray Bolger 'Hunk, The Scarecrow' died January 15, 1987. Bert Lahr 'Zeke, The Cowardly Lion' died December 4, 1967.
In 1938, she was cast in the main role as Dorothy Gale in The Wizard of Oz (1939), a film based on the children's book by L. Frank Baum. In this film, she sang the song with which she would forever be identified,  Over the Rainbow .