A positive direct Coombs' test in the absence of hemolytic anemia predicts high disease activity and poor renal response in systemic lupus erythematosus.
Hanaoka H, Iida H, Kiyokawa T, Takakuwa Y, Kawahata K.
Lupus. 2018 Dec;27(14):2274-2278. doi: 10.1177/0961203318809182. Epub 2018 Oct 25.