1.   Injections of allergens, the substances to which the person is allergic, have been used for decades to treat children with asthma that is triggered by allergic reactions.

2.   Neuroleptics, the medications used for decades to treat schizophrenia, have proven ineffective at improving the negative symptoms of the disorder.

3.   Tamoxifen has been used for decades to treat breast cancer.

4.   The two new medications that show promise for treating manic-depression have been used for more than a decade to treat epilepsy.

5.   PB has been used for decades to treat the neurological disease myasthenia gravis.

6.   Transfusions have been used for decades to treat leukemia and other blood cancers.

7.   While transfusions have been used for decades to treat leukemia and other blood cancers, this is their first use against solid cancers.