1. Emerging trends in the outsourcing of medical and surgical care;Boyd;Arch Surg,2011
2. Patients Beyond Borders. Medical tourism statistics and facts. Available at: https://patientsbeyondborders.com/medical-tourism-statistics-facts. Accessed May 31, 2018.
3. Braverman B. 1.4 million Americans will go abroad for medical care this year. Should you? Available at: http://www.thefiscaltimes.com/2016/08/17/14-Million-Americans-Will-Go-Abroad-Medical-Care-Year-Should-You. Accessed May 29, 2018.
4. Chambers A. Trends in U.S. travel services trade. Available at: https://www.usitc.gov/publications/332/executive_briefings/chambers_health-related_travel_final.pdf. Accessed May 29, 2018.
5. Hotelier Middle East.com. Medical tourism in Dubai rises to $390m. Available at: http://hotedliermiddleeast.com30848-medical-tourism-revenue-in-dubai-rises-to-390m/. Accessed May 31, 2018.