Realization of a part of clinical trial called A Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Oral Budesonide MMX® 9 mg Extended-release Tablets as Add-on Therapy in Patients with Active, Mild or Moderate Ulcerative Colitis not Adequately Controlled on a Background Oral 5-ASA Regimen 2012