TianQin is a proposal for a space-borne detector of gravitational waves in the millihertz frequencies. The experiment relies on a constellation of three drag-free spacecraft orbiting the Earth. Inter-spacecraft laser interferometry is used to monitor the distances between the test masses. The experiment is designed to be capable of detecting a signal with high confidence from a single source of gravitational waves within a few months of observing time. We describe the preliminary mission concept for TianQin, including the candidate source and experimental designs. We present estimates for the major constituents of the * experiment's error budget and discuss the project's overall feasibility. Given the current level of technology readiness, we expect TianQin to be flown in the second half of the next decade.

BACKGROUND.The radiologic images of 1-14-mm invasive breast carcinomas can be classified into 5 separate categories. The use of these mammographic indicators to predict patient outcome has important prognostic and therapeutic implications. METHODS.To verify the results of previous studies conducted with smaller numbers of patients, the authors studied the 24-year survival of 714 women with 1-14-mm invasive breast carcinoma according to mammographic prognostic factors. The association of mammographic features with lymph node status, histologic malignancy grade, and 24-year survival in 714 women with invasive breast carcinomas that measured 1-14 mm also was evaluated. Adjustments were made for tumor characteristics and treatment factors in the survival analysis.

LR is associated with less postoperative morbidity, but longer operation time. A prospective randomized controlled trial is warranted to fully investigate these and other outcome measures.