And now, the drug, in combination with the chemotherapy Taxol, allows patients with early-stage breast cancer an average of four months without their disease progressing.
The study, which began in May 2006, also found trainee doctors are now more likely to enter the medical profession at a later stage of life - the average age of respondents was 27, compared to 24 in 1995.
Performers take the stage 10 times a week plus an average of 12 hours of training, but otherwise say their jobs aren't so different from anyone who works eight hours a day.