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Mathru M, Rooney MW, Goldberg SA, Hirsch LJ.Mathru M, et al. Among authors: hirsch lj.Anesth Analg. 1993 Aug;77(2):250-5. doi: 10.1213/00000539-199308000-00007.Anesth Analg. 1993.PMID: 8346822