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REFERENCES 
1. Gangarosa, E.J. (1978) ^J. Inf . Pis . , 137 , 634-638. 
2. Glode, M.P., Sutton, A., Robbins, J.B., McCracken, G. H., Gotschlich, E.C., 
Kaijser, B., and Hanson, L.A. (1977) J_. Inf . Pis . , 136 supplement, 93-97. 
3. King, J. (1978) J. Inf. Pis . , 137 , 663-666. 
4. Levin, B.R. , and Stewart, F. M. , Science 196 , 216-220. 
5. Levy, S.B., Sullivan, N., and Gorbach, S. L. , (1978) Nature, 274 , 395-396. 
6. Sack, B. (1976) N. England J . Medicine , 295 , 893-894. 
7. Stamm, W.E., Martin, S.M. , and Bennet, J.V., (1977,) ^J. Inf Pis . , 136 
supplement, 151-160. 
8. Wilfert, C.M. , (1978) Ann , Rev . Medicine 29 , 129-136. 
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