Immunoprotective effect of combined pneumococcal endopeptidase O and pneumococcal surface adhesin A vaccines against Streptococcus pneumoniae infection
ZHANG Jing, CUI Ya-Li, JIANG Yong-Mei
CJCP . 2017, (5): 583 -589 .  DOI: 10.7499/j.issn.1008-8830.2017.05.021