Intention to khat chewing among youths in Raya-Azebo district, southern zone of Tigray, Ethiopia: application of the theory of planned behavior - Atsbaha, Abadi Hailay; Mekonnen, Adugnaw Berhane; Ketema, Bezawit; Gebrehiwot, Tigist Haile; Gebru, Hirut Teame; Alemseged, Embay Amare; Angaw, Yonas; Gebremedhin, Haftay; Gebremeskel, Fre; Hidru, Hagos Degefa; Gufue, Zenawi Hagos (Frontiers in Public Health, 2025)