1. Department of anesthesia, School of Nursing and Midwifery, Shiraz University of Medical Science, Shiraz, Iran
2. Operating Room Group, School of Nursing and Midwifery, Shiraz University of Medical Science, Shiraz, Iran
3. School of Nursing and Midwifery ,Operating Room Group, School of Nursing and Midwifery, Shiraz University of Medical Science, Shiraz, Iran
4. Maternal -fetal medicine research center, Department of Midwifery, School of Nursing and Midwifery, Shiraz University of medical sciences. Shiraz, Iran