FRANKFURT (Reuters) – Fresenius has hired UBS to manage the sale of its rehabilitation care clinic business as the German healthcare group focuses on core activities, Frankfurter Allgemeine Zeitung reported on Friday, citing financial sources. The rehabilitation clinics, also known as post-acute care clinics and part of the group’s hospital project development business Vamed, could be worth as much as 800 million euros ($858 million), according to the report. Fresenius declined to comment. The healthcare group’s CEO Michael Sen, who took over last October, is cutting costs and shedding non-cor…