A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. Three dogs play together on the green grass. Three dogs sleep on the couch. Two children, a male and a female, playing doctor and nurse, pretending to care for a baby. The panel recommended using long-term prospective cohort studies in estimating mortality risk reduction. However, the panel did not recommend using short-term surveys.
yes
no
no
no