Environmental Trigger(s) of Type 1 Diabetes: Why So Difficult to Identify?

Table 2

HLA typing and time points for follow-up in DIPP.

(a) Eligible HLA types	DQB1^*02/DQB1^*0302
	DQB1^*0302/X (X # DQB1^*02, 0301, 0602/0603)
(b) Time points for blood samples	Autoantibodies are measured in Tampere and Oulu at 3, 6, 18, and 24 months and then annually. In Turku every 3 months until 2 years, and then every 6 months until the age of 14 years
(c) Questionnaires	Filled out at the clinical visits at 3, 6, 18, and 24 months, and then annually
(d) Stool samples	Parents are asked to send it from 3 months to 3 years