[1] Newcastle Tyne Hosp NHS Fdn Trust, Royal Victoria Infirm, Dept Paediat & Adolescent Oncol, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[2] Newcastle Tyne Hosp NHS Fdn Trust, Royal Victoria Infirm, Dept Pathol, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[3] Newcastle Tyne Hosp NHS Fdn Trust, Royal Victoria Infirm, Dept Microbiol, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[4] Newcastle Tyne Hosp NHS Fdn Trust, Royal Victoria Infirm, Dept Paediat Surg, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England