Mediating effect of smoking abstinence self-efficacy on association between health literacy and nicotine dependence of smokers in Qingdao, China - Yani Wang; Fei Qi; Jie Yang; Haiyan Xu; Aimiao Tian; Shasha Fang; Gongli Liu; Yaoqi Zhang; Shanpeng Li; Kunzheng Lv (PLoS ONE, 2026)