Javed MS, Subhani GM, Akmal M, Munir MI, Javed SH. Tramadol or Nalbuphine; Which One is Superior for Analgesia in Post-Operative Period after Percutaneous Nephrolithotomy. apmc [Internet]. 2021Mar.31 [cited 2024Dec.4];15(1):51-4. Available from: https://apmcfmu.com/index.php/apmc/article/view/1062