Actually the trials been going on since 2008 so it's a 7 year trial.But here's the biggest reason it's so small...

Inclusion Criteria:

• Subject has type 1 or type 2 diabetes mellitus and is currently being treated with or has been treated with Exubera.
• Subject has a severe phobia to sc injections of insulin (needle phobia) preventing conventional treatment OR has impaired sc insulin absorption