Zervas, Spyros. “Strategic Marketing Funnel Models in Healthcare: The Role of Healthcare Professionals and Patients in the Referral Paths and the Consumerization of Healthcare Industry”. Journal of Marketing Development and Competitiveness 17, no. 2 (August 4, 2023). Accessed July 22, 2024. https://articlegateway.com/index.php/JMDC/article/view/6296.