https://corporateeurope.org/power-lobbies/2017/06/creeping-privatisation-healthcare
https://www.ftc.gov/system/files/ftc_gov/pdf/pharmacy-benefit-managers-staff-report.pdf
https://www.bruegel.org/sites/default/files/2025-08/PB%2023%202025_2.pdf
https://www.oecd-ilibrary.org/docserver/f97beae7-en.pdf?expires=1646810684&id=id&accname=guest&checksum=AAB69BF9AC6696BD5622F1A55B317C16