[1] Univ Med Ctr Groningen, Groningen, Netherlands
[2] UCL, London, England
[3] Southern Med Univ, Nanfang Hosp, Affiliated Hosp, Guangzhou, Peoples R China
[4] AstraZeneca, Gothenburg, Sweden
[5] Natl Inst Med Sci & Nutr Salvador Zubiran, Mexico City, DF, Mexico
[6] Steno Diabet Ctr Copenhagen, Gentofte, Denmark
[7] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[8] Sch Med, Stanford, CA USA
[9] Univ Glasgow, Glasgow, Lanark, Scotland