All recruited patients will be given patient identification number (PIN) for the present study of 01-20 according to their order of interview and recruitment. Investigators will prepare 10 yellow and 10 green cards, which will be inserted in 20 thick-paper envelopes. Then, all envelopes will be sealed, mixed and randomly allocated to get numbers of 01 to 20 (Envelop number). After printing the envelope number outside envelope, all sealed envelopes with cards will be conveyed to and kept in pharmacy department.