[1] Univ Warwick, Warwick Med Sch, Coventry CV4 7AL, England
[2] Univ Hosp Coventry & Warwickshire NHS Trust, Warwickshire Inst Study Diabet Endocrinol & Metab, Coventry CV2 2DX, England
[3] Univ Crete, Sch Med, Lab Hlth & Sci, Iraklion 71003, Greece
[4] Univ Linkoping, Dept Hlth Med & Caring Sci, SE-58183 Linkoping, Sweden
[5] Frederick Univ, Dept Nursing, CY-1036 Nicosia, Cyprus
[6] Univ Wolverhampton, Fac Educ, Sch Hlth & Soc, Wolverhampton WV1 1LY, England
[7] Coventry Univ, Res Inst Hlth & Wellbeing, Ctr Sport Exercise & Life Sci, Coventry CV1 5FB, England
[8] Univ Chester, Chester Med Sch, Shrewsbury SY3 8HQ, England
[9] EXI, Peoples Mission Hall,20-30 Whitechapel Rd, London E1 1EW, England
[10] Univ Hosp Coventry & Warwickshire NHS Trust, Clin Evidence Based Informat Serv CEBIS, Coventry CV2 2DX, England
[11] Forum Hlth Ctr, Sowe Valley Primary Care Network, Coventry CV2 5EP, England
[12] Aston Univ, Coll Hlth & Life Sci, Aston Med Sch, Birmingham B4 7ET, England
[13] Agr Univ Athens, Sch Food & Nutr Sci, Dept Food Sci & Human Nutr, Lab Dietet & Qual Life, Athens 11855, Greece