Creating Clinical Cohorts: Challenges Encountered in Two Canadian Provinces. - Shoemaker ES; Becker ML; Liddy CE; McClarty LM; Asghari S; Hurd J; Rourke SB; Shaw SY; Bibeau C; Rosenes R; Lundrigan P; Crowe L; et al. (Healthcare policy = Politiques de sante, 2019)