Thank you, Mr. Chairman.
My first question is to Dr. O'Brien. I would like to better understand the lines of communication, and perhaps you could remind me of some of the dates and the chronology when the issue became urgent and critical, in your determination--the line of communication both up the chain of command and down through the positions, like radiologists working in the hospital.
At what point, and how, was it signalled to you that there was a problem?