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Venkatesan PP, Shortkroff S, Zalutsky MR, Sledge CB.Venkatesan PP, et al. Among authors: sledge cb.Int J Rad Appl Instrum B. 1990;17(4):357-62. doi: 10.1016/0883-2897(90)90101-6.Int J Rad Appl Instrum B. 1990.PMID: 2387743