Authors’ Declaration & Ethics Statement
The authors declare no competing interests. They have no relevant financial or non-financial interests to disclose.
The study was conducted in accordance with the ethical standards of national and institutional committees on human experimentation and the Helsinki Declaration of 1964, as revised in 2000.
Institutional Approval
The Human Research Ethics Committee of the Royal Melbourne Children's Hospital approved all data collection protocols (#33168).
Informed Consent
Informed written consent was obtained from participants' parents at study inception. From wave 7 onward, participants gave informed consent prior to participating in each subsequent wave.