Premenopausal patients with neither risk factor had a very low failure rate ( 2 . 6% at 5 years ) , regardless of age .
premenopausal patients with neither risk factor had a very low failure rate ( 2 . 6% at 5 years ) , regardless of age .
B-multi_cell B-multi_cell O O O O O O O O O O O O O O O O O O O O O O O