Hall RE, Tusevljak N, Wu CF, Ibrahim Q, Schulze K, Khan AM, Desai D, Awadalla P, Broet P, Dummer TJB, Hicks J, Tardif JC, Teo KK, Vena J, Lee D, Friedrich M, Anand SS, Tu JV. The Canadian alliance for healthy hearts and minds: how well does it reflect the Canadian population? CJC Open. 2020 Jul 22;2(6):599-609. doi: 10.1016/j.cjco.2020.07.013
Christensen T, Riis AH, Hatch EE, Wise LA, Nielsen MG, Rothman KJ, Toft Sorensen H, Mikkelsen EM. Costs and efficiency of online and offline recruitment methods: a web-based cohort study. J Med Internet Res. 2017 Mar 1;19(3):e58. doi: 10.2196/jmir.6716