All type of patients: 8 trials - Nauck - Feinglos - Testa - Simonson - Birkeland - Birkeland - Rosenstock - Goldstein
All types of patients: 6 trials - Testa - Simonson - Birkeland - Birkeland - Rosenstock - Goldstein
Patients inadequately controlled on monotherapy : 2 trials - Rosenstock - Goldstein
Patients insufficiently controlled on SU: 1 trials - Rosenstock