Prevalence and severity of anxiety, depression, and stress among optometry students in Nigeria: A cross-sectional study - Michael Agyemang Kwarteng; Osamudiamen McHillary Ogiemudia; Bernadine N. Ekpenyong; Okechi U. Amaechi; Grace Ogbonna; Edith I. Daniel-Nwosu; Ngozika Esther Ezinne; Oforbuike Onyebuchi Ike; Kelechi C. Ogbuechi; Uchechukwu Levi Osuagwu (PLoS ONE, 2026)