NGUYEN, Thi Trang, et al. “NUTRITIONAL STATUS OF ELDERLY PATIENTS AND SOME RELEVANT FACTORS AT INTENSIVE CARE UNIT, NATIONAL GERIATRIC HOSPITAL IN 2017 -2018”. Vietnam Journal of Nutrition &Amp; Food, vol. 14, no. 5, Sept. 2022, pp. 9-16, https://tapchidinhduongthucpham.org.vn/index.php/jfns/article/view/318.