Lifelines participants participating in general assessment 2A visited a location of their choice for a second time.
At the location, they underwent the following procedures:

• Fasting venapuncture to collect blood samples for analyses and storage (8+ years old).
• Handing in of 24-h urine samples for analyses and storage
• Handing in of first morning urine samples for analyses and storage

2A Visit 2 was preceded by 2A Visit 1 2A Visit 2 was accompanied by 2A Questionnaire 2 which was filled in, on average, xx days (+/- yy days) prior to 2A visit 2.
2A Visit 2 was the final part of general assessment 2A.

2A Visit 2 is procedurally equivalent to 1A Visit 2 and 3A Visit 2. The average time between 1A Visit 2 and 2A Visit 2 was xx months (+/- yy months).