Regional variations and determinants of acute respiratory infection in Ethiopian children under five years: a multilevel analysis. - Girmay AM; Getachew T; Zeru A; Ararso D; Achamyeleh H; Yirtaw TG; Taddele W; Dagne T; Zeweldemariam MS; Alemayehu S; Tesfaye H; Chekol DA; et al. (Tropical medicine and health, 2026)