Details of ethical approval
No ethical approval was required for this study as all data were drawn
from STOP cohort. The STOP study protocol was registered at
www.anzctr.org.au (registration number
ACTRN12614000985684) and was approved by the Human Research Committee of
the Women’s and Children’s Hospital Adelaide Australia (HREC/14/WCHN/90)
on 16th September 2014.