Statement: the primary trial treament last for a shorter period of time than the secondary trial treatment.
Primary_evidence: INTERVENTION 1:    Accelerated Partial Breast Brachytherapy   Each patient will receive accelerated partial breast brachytherapy with multiple plane implant.   Patients will receive 3400 cGy delivered in 10 twice-daily fractions. Treatment is to be given over 5-7 days with a minimum of 6 hours separation between fractions.
Secondary_evidence: INTERVENTION 1:    Arm I (Cranial Microcurrent Electrical Stimulation [CES])   Patients receive a CES unit (Alpha-Stim® 100 Microcurrent Stimulator) that passes microcurrent levels of biphasic electrical stimulation via ear-lobe electrodes. The CES unit is preset to provide 1 hour of 100 μA (sub-sensory level), modified square-wave biphasic stimulation on a 50% duty cycle at .05 Hz, and to automatically turn off at the end of 1 hour. Patients use their CES unit once daily in weeks 1-18.   energy-based therapy: Given once a day for 18 weeks INTERVENTION 2:    Arm II (Sham CES)   Patients receive a CES unit as in arm I, but the ear-lobe electrodes do not pass electrical current. Patients use their CES unit once daily in weeks 1-18.   sham intervention: Given once a day for 18 weeks