Mortality and health outcomes associated with non-communicable disease risk factors: Protocol for the IRAN-STEPS Follow-Up Cohort (ISFUC) based on the 2021 national survey - Hosein Ataei-Goujani; Sarmad Salehi; Pardis Zarepour; Ozra Tabatabaei-Malazy; Nazila Rezaei; Mina Mirzad; Anis Gharajeh; Samaneh Akbarpour; Yosra Azizpour (PLOS One, 2026)