Werler MM, Sheehan JE, Mitchell AA. Vasoconstrictive exposures and risks of gastroschisis and small intestinal atresia. Epidemiology 2003;14:349-54.

Werler MM, Sheehan JE, Mitchell AA. Maternal medication use and risks of gastroschisis and small intestinal atresia. Am J Epidemiol 2002;155:26-31.