There may be a _______ between later bedtimes and weight gain, new research suggests.Researchers studied 3,342 adolescents starting in 1996, _______ them through 2009. At three points over the years, all reported their _______ bedtimes, as well as information on fast food consumption, exercise and television _______. The scientists _______ Body Mass Index at each interview.After Controlling for age, sex, race, ethnicity and socioeconomic _______, the researchers found that each hour _______ bedtime during the school or workweek was _______ with about a two-point increase in B.M.I. The effect w