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SNYDMAN DR, CUCHURAL GJ, MCDERMOTT L, IANNINI PB, HARRELL LJ, CLEARY TJ, OKEEFE JP, HECHT D, PIERSON CL, RIHS JD, FINEGOLD SM, ZEVROS, GORBACH, FRY, BROOK. SUSCEPTIBILITY VARIATIONS IN BACTEROIDES-FRAGILIS - A NATIONAL SURVEY. INFECTIOUS DISEASES IN CLINICAL PRACTICE. WILLIAMS & WILKINS; 1994 Jan 1;3:S34–S43.