How CSI supplied large quantities of ruxolitinib to a biotech’s ongoing Phase 3 oncology study involving 14 countries, nine depots and 67 site shipments Challenge CSI was approached by a biotech conducting a full global Phase 3 oncology study spanning 14 countries. We were asked to purchase and supply a significant quantity of ruxolitinib within a tight timeframe: with the contract signed in December 2022, the client aimed to have the first sites supplied by March 2023. The