"Kurindira umwaka umwe vyokogwa ku bagore benshi, kandi birakenewe mu kwikinga ingorane z'amagara." Ico cigwa cakorewe ku mvyaro 150000 muri Canada, n'ishuli kaminuza "University of British Columbia" (UBC) n'ishuli "Harvard TH Chan School of Public Health", casohowe n'ikigo JAMA Internal Medicine.
