Table 3.

Biospecimen sample collection for the SUMMIT study^a

Sample type	Description
Maternal blood	• 30 mL blood (Serum tube 10 mL, potassium EDTA 10 mL and 5 mL, and Trace Elements 5 mL) • Cryopreservation of plasma trace element, serum, plasma, buffy coat, red blood cells aliquots • Sample collected at day 0 and day 21.
Breast milk	• Expressed milk (3–8 mL) from a single breast expression episode • Cryopreserved aliquots of whole milk • Sample collected at days 0, 7, 14 and 21.

Sample type

Description

Maternal blood

• 30 mL blood (Serum tube 10 mL, potassium EDTA 10 mL and 5 mL, and Trace Elements 5 mL)

• Cryopreservation of plasma trace element, serum, plasma, buffy coat, red blood cells aliquots

• Sample collected at day 0 and day 21.

Breast milk

• Expressed milk (3–8 mL) from a single breast expression episode

• Cryopreserved aliquots of whole milk

• Sample collected at days 0, 7, 14 and 21.

^a All biological samples are collected for research purposes only at selected sites only