Drupal-Bibcite0<style face="normal" font="default" size="100%">Does pre-existing morbidity influences risks and benefits of total hip replacement for osteoarthritis: a prospective study of 6682 patients from linked national datasets in England</style><style face="normal" font="default" size="100%">Does pre-existing morbidity influences risks and benefits of total hip replacement for osteoarthritis: a prospective study of 6682 patients from linked national datasets in England</style>