https://www.brookings.edu/wp-content/uploads/2022/08/Prescription_Drug_CPI_WP.pdf
https://journals.sagepub.com/doi/pdf/10.1177/00187267231218430
http://ecipe.org//app/uploads/2018/02/ECIPE_Occasional0218_HLM_V7.pdf
http://www.europeaninstitute.org/index.php/311-european-affairs/ea-october-2017/2242-as-chinese-investment-rises-in-europe-brussels-proposes-greater-scrutiny-of-foreign-purchases-of-eu-based-companies