@article{997,
  author = {Cynthia Chappell and Pablo Okhuysen and Charles Sterling and Constance Wang and Walter Jakubowski and Herbert Dupont},
  title = {Infectivity of Cryptosporidium parvum in healthy adults with pre-existing anti-C. parvum serum immunoglobulin G.},
  year = {1999},
  journal = {The American journal of tropical medicine and hygiene},
  volume = {60},
  pages = {157–164},
  language = {eng},
}