sentences:  Recruitment for the TEDDY study began in 2004 and was completed in 2010.Potential TEDDY subjects were identified at birth by genetic screening of the HLA-DR/DQ loci, which are considered to be highly important in determining whether an individual will develop Type 1 Diabetes.Parents of newborns with HLA DR/DQ genotypes associated with a high risk for T1D were approached for enrollment in the study.