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Cooper JS, Guo MD, Herskovic A, Macdonald JS, Martenson JA Jr, Al-Sarraf M, Byhardt R, Russell AH, Beitler JJ, Spencer S, Asbell SO, Graham MV, Leichman LL.Cooper JS, et al. Among authors: byhardt r.JAMA. 1999 May 5;281(17):1623-7. doi: 10.1001/jama.281.17.1623.JAMA. 1999.PMID: 10235156Clinical Trial.