cold hemolytic anemiamicroangiopathic hemolytic anemiaalloimmune hemolytic anemiaautoimmune hemolytic anemia causescongenital hemolytic anemiahereditary hemolytic anemiainherited hemolytic anemiaacquired hemolytic anemiachronic hemolytic anemiadefine hemolytic anemiaagglutinin hemolytic anemiaimmune hemolytic anemia