Muhammad Usman Khalid, Mohammad Hamza Bajwa, Mashal Murad Shah, Syed Nabeel Zafar, Altaf Ali Laghari, Naveed Zaman Akhunzada, Saad bin Anis, Muhammad Faraz Raghib , Sameen Siddiqi and Syed Ather Enam  (2022) “ Factors associated with lost to follow up in patients with brain tumours: A multi-centre study in Pakistan”, Journal of the Pakistan Medical Association, 72(11), pp. S16 - S24. doi: 10.47391/JPMA.11-S4-AKUB03.