Khat chewing, poly-substance use, and lower urinary tract symptoms: a cross-sectional analysis among Yemeni medical university students. - Noman, Mohammed; Ahmed, Faisal; Al-Wageeh, Saleh; Alyhari, Qasem; Ghabisha, Saif; Ateik, Ahmed; Alnadhari, Ibrahim; Al-Hagri, Abdulghani; Alhajeeli, Nasr; Karama, Mazen (Archives of Italian Urology & Andrology / Archivio Italiano di Urologia Andrologia, 2026)