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Fred de Sam Lazaro of Twin Cities Public Television reports on U.S.-trained foreign doctors and the countries they've left behind.

Susan Dentzer looks at the causes of spina bifida and efforts to prevent the disease by encouraging women to take more folic acid.

Godfrey P. Oakley, Jr., is a visiting professor of epidemiology at the Rollins School of Public Health of Emory University. He is the former director of the division of Birth Defects and Development of Disabilities at the Center for Disease…