Drupal-Bibcite31<style face="normal" font="default" size="100%">Importance of feasibility assessments before implementing non-interventional pharmacoepidemiologic studies of vaccines: lessons learned and recommendations for future studies</style><style face="normal" font="default" size="100%">Importance of feasibility assessments before implementing non-interventional pharmacoepidemiologic studies of vaccines: lessons learned and recommendations for future studies</style>