Niebyl, Jennifer R. (2010). "Nausea and Vomiting in Pregnancy". New England Journal of Medicine. 363 (16): 1544–1550. doi:10.1056/NEJMcp1003896. PMID20942670.
Niebyl, Jennifer R. (2010). "Nausea and Vomiting in Pregnancy". New England Journal of Medicine. 363 (16): 1544–1550. doi:10.1056/NEJMcp1003896. PMID20942670.