Naz, S. .; Ibrahim, N. .; Sharif, S. .; Bashir, N. .; Sajjad, E. .; Asghar, I. .; Irshad, S. .; Firasat, S. .; Kaul, H. .; Sarwar, S. . Prevalence and Association of Different Levels of Intellectual Disability With Prenatal, Perinatal, Neonatal and Postnatal Factors: Prevalence and Association of Levels of ID. PPASB 2021, 58, 75-82.