respiration meta-analysis National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine treatment outcome Infant newborn length of stay Artificial respiratory function tests respiratory tract infections / mortality antiviral agents / therapeutic use* ribavirin / therapeutic use* respiratory syncytial virus infections / drug therapy* respiratory tract infections / drug therapy* respiratory syncytial virus infections / mortality respiratory syncytial virus infections / physiopathology pmid:8790125 doi:10.1001/archpedi.1996.02170340056011 a g randolph e e wang oxygen inhalation therapy research design respiratory tract infections / physiopathology