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Schild SE, Gunderson LL, Haddock MG, Wong WW, Nelson H.Schild SE, et al. Among authors: nelson h.Int J Radiat Oncol Biol Phys. 1997 Jan 1;37(1):51-8. doi: 10.1016/s0360-3016(96)00462-2.Int J Radiat Oncol Biol Phys. 1997.PMID: 9054876