CHQ: Hip replacement surgery
  My mother is 76 y.o. and having a lot of pain in her left hip joint.She was told that she needs a new joint. She also have a Parkinson disease (main symptom at this time is tremor in a left wrist). I would like to know if NIH providing hip replacement surgery for the patients like her, clinical trials?  Thank you.
Summary: Are there clinical trials for hip replacement with Parkinson's disease?