“…However, spreading payments may conflict with standard financial flows since a link is needed between the medical system and the financial system to allow the initiation of payments when outcomes are achieved and payments have to be tracked over multiple years which may create additional administrative costs (Garrison Jr et al, 2013;Kleinke and McGee, 2015;Slocomb et al, 2017;Richardson and Ling, 2018). These difficulties are similar to the financial challenges experienced by OBAs with upfront payments, such as the OBA for sunitinib in the United Kingdom, where the healthcare provider may need to adjust stock control systems, verify if the cost of the drug is correctly reflected in the financial systems and ensure payments are correctly triggered (Carlson et al, 2009;Lucas et al, 2009;Williamson and Thomson, 2010;Espin et al, 2011;Coulton et al, 2012;Towse et al, 2012;Ferrario and Kanavos, 2013;Navarria et al, 2015;Faulkner et al, 2016;Gerkens et al, 2017;Pauwels et al, 2017;Toumi et al, 2017;Bouvy et al, 2018;Cole et al, 2019;Mahendraratnam et al, 2019;Wenzl and Chapman, 2019). To avoid the burden of current financial flows, payers could directly purchase the therapeutic product from the manufacturer and distribute it to the healthcare provider, as proposed by Spark Therapeutics for the reimbursement of Luxturna (Senior, 2018).…”