Among all outpatients, list out those have low hemoglobin level. State the different IDs and their sex.
outpatients refers to Admission = '-'; low hemoglobin level refers to HBG < 10;
SELECT DISTINCT T1.ID, T1.SEX FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.HGB < 10 AND T1.Admission = '-'