Lieberman and other psychiatrists noted that other studies of SSRIs in children also have failed to find large differences in effectiveness between the drugs and placebos .
Some psychiatrists , Dr. Lieberman among them , noted that other studies of S.S.R.I. ' s in children had also failed to find large differences in effectiveness between the drugs and placebos .
Under the program , US officials work with foreign port authorities to seek out high-risk cargo before it can reach the United States .