CREATE TABLE table_1555308_1 (bleeding_time VARCHAR(255), prothrombin_time VARCHAR(255), platelet_count VARCHAR(255))
What are all the possible bleeding time results where prothrombin time and platelet count are both unaffected?
    
SQL: SELECT bleeding_time FROM table_1555308_1 WHERE prothrombin_time = "Unaffected" AND platelet_count = "Unaffected"