I've heard of corticosteriod and hyaluronic acid injections for arthritis pain relief.  What's the difference, and are they effective for both rheumatoid and osteoarthritis?
D000305:Adrenal Cortex Hormones / Q000627:therapeutic use*; D001172:Arthritis, Rheumatoid / Q000188:drug therapy / Q000503:physiopathology*; D006801:Humans; D006820:Hyaluronic Acid / Q000627:therapeutic use*; D010003:Osteoarthritis / Q000188:drug therapy / Q000503:physiopathology*; D010146:Pain / Q000188:drug therapy*
D000305:Adrenal Cortex Hormones; D006820:Hyaluronic Acid