private Order FindOrderForStudy()
{
var select = new OrderSelectCriteria();
select.ServerPartitionKey.EqualTo(_study.ServerPartitionKey);
select.AccessionNumber.EqualTo(_study.AccessionNumber);
select.PatientId.EqualTo(_study.PatientId);
var broker = UpdateContext.GetBroker<IOrderEntityBroker>();
return broker.FindOne(select);
}