Pharma marketing payments to MDs (none; < $100; >$100) correlated with Medicare billing of Intraarticular Hyaluronic Acid injx. In 20 501 MDs, 41.5% gave HA injx; Odds incr w/ payment <$100 (OR 2.06) or >$100 (OR 3.28); 12.7% & 21% more likely https://t.co/BP395xm0TW https://t.co/MDxT8Kl4kq