1 Subjects: “...heart failure, echocardiography, cancer, infection, hypertension, biofilm...”

2 Subjects: “...infection, reliability, volatile organic compounds, primary care, hospital, molecular epidemiology...”

3 Subjects: “...infective endocarditis, epidemiology, surgery, mortality, dentistry, developing countries...”

4 Subjects: “...echocardiography, infective endocarditis, risk factors, ethics, addiction, congenital heart disease...”