Are at-home sleep studies performed using portable monitors as effective at diagnosing obstructive sleep apnea in adults as sleep laboratory-based polysomnography?

For patients with terminal chronic illnessk, does more face-to-face time with a healthcare provider decrease aggressive end-of-life care such as ICU admission, feeding tube placement, CPR, or intubation?

In adults, what is the best diagnotic test for restless leg syndrome?

In adult smokers unwilling or unable to quit, does changing from tobacco cigarettes to "electronic cigarettes" decrease the incidence of negative health effects associated with smoking tobacco?

In women with risk factors for breast cancer, at what age should screening begin and with what modality?