[1] Univ Kebangsaan Malaysia, Fac Dent, Dept Family Oral Hlth, Kuala Lumpur 50300, Malaysia
[2] Univ Kebangsaan Malaysia, Family Oral Wellness Res Grp, Kuala Lumpur 50300, Malaysia
[3] Univ Kebangsaan Malaysia, Fac Dent, Dept Restorat Dent, Kuala Lumpur 50300, Malaysia
[4] Minist Hlth Malaysia, Selangor State Hlth Dept, Sungai Buloh Dent Clin, Sungai Buloh 47000, Malaysia
[5] Univ Kebangsaan Malaysia, Fac Med, Dept Family Med, Kuala Lumpur 56000, Malaysia
[6] Univ Kebangsaan Malaysia, Fac Social Sci & Humanities, Ctr Res Psychol & Human Well Being, Bandar Baru Bangi 43600, Malaysia