.as of this month, there are 56 companies in china involved in the commercialization of car cell therapies.may 17, 2018 -- the fda has approved the first in a new class of migraine drugs that aim to fight painful..chemotherapy involved two hours at the hospital every other week. he'd leave wearing a fanny pack that would continue to deliver treatment for 48 straight hours, one slow drip at a time..one woman's migraine story