Evaluation of needle size for breast biopsy: comparison of 14-, 16-, and 18-gauge biopsy needles. - Helbich,T.H.; Rudas,M.; Haitel,A.; Kohlberger,P.D.; Thurnher,M.; Gnant,M.; Wunderbaldinger,P.; Wolf,G.; Mostbeck,G.H. (AJR, 1998)