1. Bristol‐Myers SquibbWallingfordConnecticutUnited States
2. Karolinska Universitetssjukhuset HuddingeStockholmSweden
3. Universitetssjukhuset MASMalmoSweden
4. University of Goteborg, Sahlgrenska University HospitalMölndalSweden
5. Bristol‐Myers SquibbLawrencevilleNew JerseyUnited States
6. Bristol‐Myers SquibbPrincetonNew JerseyUnited States