Determination of Association between Onychoscopy Features and Nail Plate Potassium Hydroxide Test Positivity in Diagnosis of Onychomycosis: A Cross-Sectional Study - Khubaib Tahir; Sumera Hanif; Rabia Shaukat; Aliza Hamadani; Ayesha Arshad Chattha; Iram Kausar; Haroon Nabi (Pakistan Journal of Health Sciences, 2026)