Olmstead County (Mayo) population study shows 47 lupus nephritis (LN) pts betw 1976-2018. Incidence doubled from 1980s (0.6 per 100K) to 2018 (1.2/100K); with women of childbearing age as the most affected group. #ACR20 Abstr#0274 https://t.co/uhAMd0EtJl