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M. E. LOCKING,
S. J. O'BRIEN,
W. J. REILLY,
E. M. WRIGHT,
D. M. CAMPBELL,
J. E. COIA,
L. M. BROWNING
and C. N. RAMSAY
(2001).
Risk factors for sporadic cases of Escherichia coli O157 infection: the importance of contact with animal excreta. Epidemiology and Infection,
127
,
pp 215-220
doi:10.1017/S0950268801006045