Hemolytic anemia types Mnemonic

SHEEP T!T:

Sickle cell
Heriditary splenocytosis
Enzyme deficiencies: [G6P, pyruvate kinase] 
Erythroblastosis fetalis
Paroxysmal nocturnal hemoglobinuria 
Trauma to RBCs
Immunohemolytics: [warm Ab, cold Ag] 
Thalassemias: [alpha, beta]