Background Patellofemoral pain is considered one of the most common forms of knee pain,
affecting adults, adolescents, and physically active populations. Inconsistencies in reported …

Twenty years have elapsed since Mantel and Haenszel published their seminal article on
statistical aspects of the analysis of data from case-control studies. Their methodology has …

Background A randomised trial designed to compare three and two doses of quadrivalent
human papillomavirus (HPV) vaccine in adolescent girls in India was converted to a cohort …

Background Little is known about the incidence and risk of intensive care unit (ICU)‐
acquired bloodstream infections (BSI) in critically ill patients with coronavirus disease 2019 …

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection
disproportionally affects frail, elderly patients and those with multiple chronic comorbidities …

The primary objective of this multicenter, observational, retrospective study was to assess
the incidence rate of ventilator-associated pneumonia (VAP) in coronavirus disease 2019 …

Background Anaphylaxis is a potentially life-threatening allergic reaction. The risk of
anaphylaxis after vaccination has not been well described in adults or with newer vaccines …

Background The role of fluid resuscitation in the treatment of children with shock and life-
threatening infections who live in resource-limited settings is not established. Methods We …

Background Human papillomavirus (HPV) infection, particularly with type 16, causes a
growing fraction of oropharyngeal cancers, whose incidence is increasing, mainly in …

METHODS Setting. This study was conducted at Group Health Cooperative (GHC) of Puget
Sound during 1988 as part of a large senior health promotion demonstration project funded …