1 Bacha Khan College of Dentistry, Mardan, Pakistan. anas.khan.jaddon137@gmail.com.
2 Nursing Department, Hamad Medical Corporation, Doha, PO Box 3050, Doha, Qatar; Faculty of Medicine, University Malaya (UM), 50603, Kuala Lumpur, Malaysia. jiqbal3@hamad.qa.
3 Senior Scientist and Deputy Chair for Research, Geriatrics and Long-Term Care Department, Rumailah Hospital, Hamad Medical Corporation, Doha, Qatar. bsathian@hamad.qa.