Drupal-Bibcite0<style face="normal" font="default" size="100%">Differential expression of programmed death 1 (PD-1) on various immune cells and its role in human leprosy.</style><style face="normal" font="default" size="100%">Differential expression of programmed death 1 (PD-1) on various immune cells and its role in human leprosy.</style>