<classify> Laktar Ehud Ur, ngire mar weche thieth e Mbalariany mar Dalhousie ei Halifax, Nova Scottia, kendo jakom mar migao mar klinik kod sayans mar Riwruok mar Tuo sukari ma Kanada nochiwo siem ni nonro no pod nitiere e kindege mag chakruok.  <topic>: disease, research, canada 