After the termination of Employee's employment with DaVita, Employee agrees to fully cooperate with DaVita with any actual or potential legal proceedings, or internal investigations, in which DaVita requests his or her assistance. Such assistance shall include, but is not limited to, participating in interviews with representatives of DaVita, attending, as a witness, depositions, trials, or other similar proceedings without requiring a subpoena, and producing and/or providing any documents.. This cooperation shall be at no additional cost to DaVita, with the exception of reasonable out-of-pocket expenses which must have been pre-approved in writing by DaVita.