1.   Administration of L-arginine alone did not alter the resting blood pressure in untreated animals.

2.   Animals given the drug before or shortly after exposure to pox virus survive, whereas untreated animals die.

3.   In untreated animals, only half the neurons survived after two weeks.

4.   The drug reduced the number of lung metastases by more than half, compared with untreated animals.

5.   Because the naturally occurring compounds cannot be distinguished from the hormones in untreated animals, treatement cannot be detected, he said.