All of the following are associated with Coombs-positive hemolytic anemia except -
Collagen vascular diseases associated with autoimmune hemolytic anemia (warm antibody type → Coomb's positive)

Common → SLE
Rare → Rheumatoid arthritis, PAN, scleroderma, sjogren's syndrome
Thrombotic thrombocytopenic purpura (TTP)
Scleroderma
SLE
PAN