PRA Health Sciences, Inc. has bought out its joint venture with Takeda Pharmaceutical Co. in Japan, which was completed on June 1. PRA Health Sciences K.K. has started its operation in Japan independently as a subsidiary of PRA.   With the expansion into Japan, PRA will have offices in Tokyo and Osaka, acquiring expert staff members from Takeda for the growing business. Current staff totals are 450 with the opportunity for additional growth in the near term.   “In recent years, clinical deve...