Kufundvwa lokwentiwe muva kwe-JAMA Network Open, bacwaningi base United States of America (US) baphenye budlelwane emkhatsini wesikweleti setekwelashwa kanye nemiphumela yetemphilo yebantfu e-US. Batfole kutsi sikweleti setekwelashwa sihlobene nekugula lokumatima kanye nekukhuphuka kwebantfu labafa ngaphambi kwesikhatsi kanye nekufa.