1. Department of Internal Medicine; University of Pisa; Pisa; Italy
2. Boehringer Ingelheim Pharmaceuticals, Inc.; Ridgefield; CT; USA
3. Boehringer Ingelheim Pharma GmbH & Co. KG; Biberach; Germany
4. Boehringer Ingelheim Pharma GmbH & Co. KG; Ingelheim; Germany