Occupational stress, coping strategies, and associated factors among primary healthcare workers in Vietnam - Han Thi Ngoc Nguyen; Phi Hoang Nguyen; Han Thi Ngoc Nong; Ly Trieu Vo; Dung Dang Nguyen; Nhi Thi Bui; Yen Nhi Thi Nguyen; Giao Huynh (PLoS ONE, 2026)