MEMPHIS, Tenn.--(BUSINESS WIRE)--Following the conclusion of a series of meetings with the United States Food and Drug Administration (FDA), GTx, Inc. (Nasdaq: GTXI) announced today the clinical trial design for the two Phase III Ostarine™ registration studies for the prevention and treatment of muscle wasting in patients with non-small cell lung cancer (NSCLC). In July, GTx will initiate the Ostarine POWER1 and POWER2 (Prevention And Treatment Of Muscle Wasting in CancER) Phase III clinical trials and, assuming enrollment for both studies is completed within one year, expects completion of the two five month studies (last patient last visit) in the fourth quarter of 2012.