They determine the energy requirements of subjects and adjust diets as required, most often for weight maintenance, throughout the study.
The previous Labour government required most new disability applicants to undergo face-to-face medical assessments.
In the majority of cases, no special treatment other than bed rest is required; most recover fully from the disease.
The rail plan would have required most visitors to leave their cars outside the park and travel to the canyon's rim by train.
At the core of the reform was a programme, Temporary Assistance for Needy Families (TANF), that required most parents receiving cash grants to seek employment.
And in 1988, a Casey plan that required most residents to separate their trash for recycling was approved, making Pennsylvania the largest state to require recycling.
Signed by President Bill Clinton in 1996, it required most recipients to work and limited the federal assistance to a maximum of 60 months.
Zoltar's prospects got a lift after the Federal Communications Commission in 1996 required most wireless phones to be able to identify their location during 911 calls by 2001.
An eye for collectibles required, most anything old will do: handcrafted items valued for their patina and charm, fine dovetailed craft of the cabinetmaker.
The most significant of those reforms put a five-year lifetime limit on eligibility and required most recipients to look for work or enter job training.
The bill would have required most Americans to get coverage through large regional purchasing groups and could have had the effect of limiting some people's choices of doctors.
