[1] Dallas Diabet & Endocrine Cntr, Dallas, TX USA
[2] Univ Hosp Aachen, Dept Internal Med 1, Aachen, Germany
[3] Boehringer Ingelheim GmbH & Co KG, Global Biometr & Datamanagement, Biberach, Germany
[4] Boehringer Ingelheim KG, Therapeut Area Metab, Ingelheim, Germany
[5] Boehringer Ingelheim GmbH & Co KG, Therapeut Area Metab, Bracknell, Berks, England