First, I'd like to thank you for your kind words about Dr. Butler-Jones. He is, indeed, a leader in the field of public health and certainly to all of us at the Public Health Agency.
To your second question and comment with respect to Clostridium difficile and the Canadian nosocomial infection surveillance program, if I may, I'm fortunate to have with me a colleague, the deputy chief public health officer, Dr. Gregory Taylor. Gregory has worked closely in these areas. I'd like to turn to Gregory to respond.