@article {lcwchs77, title = {Diarrhea caused by Escherichia coli that produce only heat-stable enterotoxin}, journal = {Infection and Immunity}, volume = {17}, year = {1977}, pages = {1}, author = {Levine, M M and Caplan, E S and Waterman, D and Cash, R A and Hornick, R B and Snyder, M J} }