Table schema:
CREATE TABLE table_238124_1 (platelet_count VARCHAR, bleeding_time VARCHAR, prothrombin_time VARCHAR)

Question: When the bleeding time is unaffected and prothrombin time is prolonged, what are the platelet counts?
SQL: SELECT platelet_count FROM table_238124_1 WHERE bleeding_time = "Unaffected" AND prothrombin_time = "Prolonged"