[1] Queens Univ Belfast, Sch Nursing & Midwifery, Belfast BT7 1NN, Antrim, North Ireland
[2] Queens Univ Belfast, Sch Med Dent & Biomed Sci, Ctr Publ Hlth, Belfast BT7 1NN, Antrim, North Ireland
[3] Aberdeen Royal Infirm, Dept Diabet, Aberdeen, Scotland
[4] St Johns Hosp Howden, W Lothian, Scotland
[5] St Marys Hosp Women & Children, Dept Obstet & Gynaecol, Manchester, Lancs, England
[6] Royal Victoria Hosp, Reg Ctr Endocrinol & Diabet, Belfast BT12 6BA, Antrim, North Ireland