fatemeh zahra karimi phd student reproductive health, student research committee, school of nursing and midwifery, mashhad university of medical sciences, mashhad, iran. talat khadivzadeh assistant professor, department of midwifery, school of nursing and midwifery, mashhad university of medical sciences, mashhad, iran masumeh saeidi: student research committee, faculty of medicine, mashhad university of medical sciences, mashhad, iran. sepideh bagheri assistant professor of pediatrics, school of medicine, mashhad university of medical sciences, mashhad, iran

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jens w. krombach department of anesthesia and perioperative care, san francisco general hospital, university of california san francisco, san francisco, ca, usa; department of anesthesia and perioperative care, san francisco general hospital, university of california san francisco, san francisco, ca, usa. tel: +1-4152064451, fax: +1-4152068163 william a. edwards department of anesthesia and perioperative care, san francisco general hospital, university of california san francisco, san francisco, ca, usa james d. marks department of anesthesia and perioperative care, san francisco general hospital, university of california san francisco, san francisco, ca, usa oliver c. radke department of anesthesiology & intensive care medicine, klinikum bremerhaven-reinkenheide, bremerhaven, germany

Svea Closser Kelly Cox Thomas M. Parris R. Matthew Landis Judith Justice Ranjani Gopinath Kenneth Maes Hailom Banteyerga Amaha Ismaila Zango Mohammed Aminu Mohammed Dukku Patricia A. Omidian Emma Varley Pauley Tedoff Adam D. Koon Laetitia Nyirazinyoye Matthew A. Luck W. Frank Pont Vanessa Neergheen Anat Rosenthal Peter Nsubuga Naveen Thacker Rashid Jooma Elizabeth Nuttall

mina iravani mohsen janghorbani elahe zarean masoud bahrami

Paul B Jacobsen Morgan Lee