Which saas payment solutions is the best in your opinion? At he moment I use saas payment solutions and make my own research on Chargebee. They specializes in subscription management and recurring billing and offer features like dunning management (automated retries for failed payments) and customer portals for self-service.
Differentiate between prospective and retrospective cohort studies. Illustrate when each of these cohort studies should be used in research and
Differentiate between prospective and retrospective cohort studies. Illustrate when each of these cohort studies should be used in research and address the strengths and weaknesses of them both. Resources LaMorte, W.W. (2016, July 12). Prospective and retrospective cohort studies. Retrieved from http://sphweb.bumc.bu.edu/otlt/mph-