Validation of the Bangla PHQ-4 in rural and urban community samples from Bangladesh - Muhammad Kamruzzaman Mozumder; Ummay Kulsum Keya; Fayaza Ahmed; Imtiazuddin Gazi; Konica Gop; Pooja Bhattacharjee; Md. Akramul Islam; Shayla Islam (PLoS ONE, 2026)