1. Lancashire County Council, County Hall, Fishergate, Preston, UK
2. Health Education North West, Regatta Place, Brunswick Business Park, Summers Road, Liverpool, UK
3. Division of Health Research, Furness Building, Lancaster University, Lancaster, UK
4. The Centre for Global Vaccine Research, Institute of Infection and Global Health, The Ronald Ross Building, University of Liverpool, Liverpool, UK
5. Field Epidemiology Service, Public Health England North West, Suite 3b, Cunard Building, Water Street, Liverpool, UK