Soemarko D.S., Department of Community Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta, 10320, Indonesia, Programme of Occupational Medicine, Department of Community Medicine, Faculty of Medicine Universitas Indonesia, Jakarta, 13220, Indonesia; Saputri F.D., Programme of Occupational Medicine, Department of Community Medicine, Faculty of Medicine Universitas Indonesia, Jakarta, 13220, Indonesia; Widyahening I.S., Department of Community Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta, 10320, Indonesia; Ilyas M., Department of Community Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta, 10320, Indonesia; Vidiawati D., Department of Community Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta, 10320, Indonesia