@article {1775,
	title = {Virulence of three distinct Cryptosporidium parvum isolates for healthy adults},
	year = {1999},
	url = {https://www.ncbi.nlm.nih.gov/pubmed/10479158},
	author = {PC Okhuysen and CL Chappell and JH Crabb and CR Sterling}
}
