Fig. 1

Flowchart of patient selection. Notes: SEER indicates Surveillance, Epidemiology, and End Results; ER, estrogen receptor; PR, progesterone receptor; and COD, cause of death.
Flowchart of patient selection. Notes: SEER indicates Surveillance, Epidemiology, and End Results; ER, estrogen receptor; PR, progesterone receptor; and COD, cause of death.