AP-003-C Study to Confirm the Efficacy of Ampion™ in Adults With Pain Due to Severe Osteoarthritis of the Knee

A Randomized Study to Confirm the Efficacy of an Intra-Articular Injection of Ampion™ in Adults With Pain Due to Severe Osteoarthritis of the Knee There will be a 7-day screening period for each subject followed by a 12-week participation period. The primary trial objective is to evaluate the clinical efficacy of Ampion using the Outcome Measures in Rheumatology Clinical Trials and Osteoarthritis Research Society International (OMERACT-OARSI) (using the Western Ontario and McMaster Universities Arthritis Index (WOMAC) 3.1 Index and Patient's Global Assessment as assessments). The secondary trial objectives are to evaluate the safety of a single intra-articular injection (4 mL) of Ampion.