1. Central Coast Public Health Unit, Northern Sydney Central Coast Area Health Service, Gosford, NSW.
2. Private Clinic, Gosford, NSW.
3. Maternity Services, Central Coast Health, Gosford, NSW.
4. NSW Newborn Screening Programme, The Children's Hospital at Westmead, Sydney, NSW.
5. International Council for the Control of Iodine Deficiency Disorders (ICCIDD), Asia Pacific Region, Sydney, NSW.
6. Area Executive Unit, Sydney West Area Health Service, Sydney, NSW.