%0 Journal Article %A Tahmeena T. Ali, BSc MD %T In memoriam Ursus %D 2007 %R 10.1503/cmaj.1070093 %J Canadian Medical Association Journal %P 752-752-a %V 177 %N 7 %U https://www.cmaj.ca/content/cmaj/177/7/752.2.full.pdf