For more than 100 years, football has been officiated using a simple chain 10 yards long. The so-called chain gang has been the sport’s judge and jury, ruling whether a ball traveled the number ...

Doing so would reduce the time it takes for the chain gang to haul the bright orange markers onto the field and gauge whether the ball passed the line to gain. The tech could cut down on ...

Many investigators have reported the association between each isolated ultrasound marker and the risk for Down syndrome. Vintzileos and associates [19] reported the incidence of ultrasound markers ...