Drupal-Bibcite0<style face="normal" font="default" size="100%">Call-shift fatigue and use of countermeasures and avoidance strategies by certified registered nurse anesthetists: a national survey.</style><style face="normal" font="default" size="100%">Call-shift fatigue and use of countermeasures and avoidance strategies by certified registered nurse anesthetists: a national survey.</style>