CREATE TABLE table_20136 ("Condition" TEXT, "Prothrombin time" TEXT, "Partial thromboplastin time" TEXT, "Bleeding time" TEXT, "Platelet count" TEXT)

How is the bleeding time wherein platelet count is decreased and prothrombin time is unaffected?
SELECT "Bleeding time" FROM table_20136 WHERE "Platelet count" = 'Decreased' AND "Prothrombin time" = 'Unaffected'
SELECT "Bleeding time" FROM "table_20136" WHERE "Platelet count" = 'Decreased' AND "Prothrombin time" = 'Unaffected'