Optimizing immunization services: A Data Envelopment Analysis (DEA) of child immunization facilities in Pakistan. - Ahmad, Taimoor; Ibrahim, Muhammad; Naz, Olan; Abdullah, Mujahid; Khan, Ayesha; Ali, Maisam; Bunde, Elizabeth; Alva, Soumya; Prosser, Wendy; Khan, Adnan Ahmad (PLoS ONE, 2024)