RE:Don't shoot me for saying this !Keep in mind that this is a randomized study and the hospitals have no way of knowing which patient received the placebo and who received the actual medications.
The safety board is the only body that has access to this information, and they approved the continuation of the trial. If you look at the press release, the safety committee reviewed the safety and efficacy of the drug. Not sure they would allow the trial to continue if it drug had no impact on patients. I could be wrong.