111.   While gene therapy studies usually involve people whose diseases are so advanced that traditional treatment does not work, the Penn experiment included OTC sufferers with less severe symptoms.

112.   The test helps determine how well treatments are working and gives researchers a window into the progression of AIDS.

113.   The treatment is working.

114.   Morton and Mitchell cautioned, however, that more research was needed before they could be sure the treatment really works.

115.   Morton and Mitchell cautioned, however,that more research was needed before they could be sure the treatment really works.