Hannan Ayub, Muhammad Zaid, Muhammad Saeed Siddiqui, Sana Javed, “Adherence on Recommended Guidelines for Pre-Operative Routine Investigations in ASA (American Society of Anaesthesiologists) Grade 1 and 2 by Anaesthesiologists working at Tertiary Care Hospitals in the Province of Sindh”, Pakistan Journal of Medical & Health Sciences, vol. 16, no. 08, p. 311, Sep. 2022.