Genomics Substudy
The purpose of this substudy is to obtain a whole blood sample from participants who have consented to participate in START. From this blood sample DNA will be extracted to study validated (present and future) genetic variants that determine the risk of the various primary and secondary outcomes assessed in START. The specimen will be securely stored for currently unspecified human genetic and other related analyses. Enrolment was open to all participants having consented to participate in START.