SDS Publications Genome-wide linkage scan to identify loci associated with type 2 diabetes and blood lipid phenotypes in the Sikh Diabetes Study. Posted: Feb 27th, 2015 TCF7L2 polymorphisms are associated with type 2 diabetes in Khatri Sikhs from North India: genetic variation affects lipid levels. Posted: Feb 27th, 2015 The Khatri Sikh Diabetes Study (SDS): study design, methodology, sample collection, and initial results. Posted: Feb 27th, 2015