“…Twenty-five of these studies (74%) reported data from BC [14-17, 22, 24-26, 28, 30-33, 35, 36, 38-47], three from ON [48][49][50], two from AB [51,52], one from BC and AB [57], one from SK [54], one from MB [53], one from QC and NT [56], one from QC and BC [55], and one from BC, AB, MB, ON, QC, NT, NS and NF [59]. Data for the studies were gathered from 1980 to 2008.…”