Health-related quality of life results in pathologic Stage C prostate cancer from a Southwest Oncology Group trial comparing radical prostatectomy alone with radical prostatectomy plus radiation therapy: Moinpour CM, Hayden KA, Unger JM, Thompson IM Jr., Redman MW, Canby-Hagino ED, Higgins BA, Sullivan JW, Lemmon D, Breslin S, Crawford ED, Southwest Oncology Group, Southwest Oncology Group Statistical Center, Fred Hutchinson Cancer Research Center, Seattle, WA