Antimicrobial susceptibility of gram-positive and gram-negative bacteria: a 5-year retrospective analysis at a multi-hospital healthcare system in Saudi Arabia oleh Saad Alhumaid, Abbas Al Mutair, Zainab Al Alawi, Ahmad J. Alzahrani, Mansour Tobaiqy, Ahmed M. Alresasi, Ibrahim Bu-Shehab, Issa Al-Hadary, Naif Alhmeed, Mossa Alismail, Ahmed H. Aldera, Fadhil AlHbabi, Haifa Al-Shammari, Ali A. Rabaan, Awad Al-Omari