
Parental decline of pneumococcal vaccination and risk of pneumococcal related disease in children
Keywords: مطالعه موردی شاهد; ICD-9; International Classification of Diseases, Ninth Revision; KPCO; Kaiser Permanente Colorado; PCV7; seven-valent pneumococcal conjugate vaccine; Case-control study; Pneumococcal vaccine; Vaccine decliner; Lobar pneumonia; Invasive pneumococcal dise