[1] Mashhad Univ Med Sci, Surg Oncol Res Ctr, Mashhad, Razavi Khorasan, Iran
[2] Mashhad Univ Med Sci, Mashhad Med Microbiol Student Res Grp, Mashhad, Razavi Khorasan, Iran
[3] Mashhad Univ Med Sci, Orthopaed Res Ctr, Mashhad, Razavi Khorasan, Iran
[4] Mashhad Univ Med Sci, Student Res Comm, Mashhad, Razavi Khorasan, Iran
[5] Mashhad Univ Med Sci, Nucl Med Resident, Mashhad, Razavi Khorasan, Iran
[6] Univ Texas Hlth Sci Ctr Houston, McGovern Med Sch, Dept Neurol, Houston, TX 77030 USA
[7] Univ Geneva Hosp & Fac Med, Infect Control Programme, 4 Rue Gabrielle Perret Gentil, CH-1211 Geneva, Switzerland
[8] Univ Geneva Hosp & Fac Med, World Hlth Org Collaborating Ctr Patient Safety, 4 Rue Gabrielle Perret Gentil, CH-1211 Geneva, Switzerland
[9] Mashhad Univ Med Sci, Imam Reza Hosp, Infect Control & Hand Hyg Res Ctr, Shariati Sq, Mashhad, Razavi Khorasan, Iran