[1] Univ Minnesota, Sch Publ Hlth, Div Hlth Policy & Management, 420 Delaware St SE,MC 729, Minneapolis, MN 55455 USA
[2] Univ Minnesota, Dept Obstet Gynecol & Womens Hlth, Minneapolis, MN 55455 USA
[3] Univ Minnesota, Div Hematol Oncol & Transplantat, Minneapolis, MN 55455 USA
[4] Univ Minnesota, Dept Radiat Oncol, Minneapolis, MN 55455 USA
[5] Univ Minnesota, Dept Surg, Box 242 UMHC, Minneapolis, MN 55455 USA