Therakos is company developing products for extracorporeal photopheresis (ECP) immune modulation therapy.

Fraser-Andrews E, Seed P, Whittaker S, et al.: Extracorporeal photopheresis in Sézary syndrome.

In medicine, photopheresis or extracorporeal photopheresis is a form of apheresis and photodynamic therapy in which blood is treated with photoactivable drugs which are then activated with ultraviolet light.

Scarisbrick JJ, Taylor P, Holtick U, et al.: U.K. consensus statement on the use of extracorporeal photopheresis for treatment of cutaneous T-cell lymphoma and chronic graft-versus-host disease.