1 Department of Medicine (Kaplan), University of Calgary; Alberta Health Services (Morrin), Calgary, Alta.; Department of Medicine (Veldhuyzen van Zanten), University of Alberta, Edmonton, Alta. ggkaplan@ucalgary.ca.
2 Department of Medicine (Kaplan), University of Calgary; Alberta Health Services (Morrin), Calgary, Alta.; Department of Medicine (Veldhuyzen van Zanten), University of Alberta, Edmonton, Alta.