Balancing adaptations and fidelity of implementation strategies to optimize primary healthcare in Ethiopia: Lessons from embedded implementation research - Biruk Bogale; Gizachew Tadele Tiruneh; Mesele Damte Argaw; Agumasie Semahegn; Nebreed Fesseha; Chala Tesfaye; Mikiyas Teferi; Hillina Tadesse; Mebrie Belete; Addis Girma; Temesgen Ayehu; Yibeltal Siraneh; et al. (PLoS ONE, 2026)