here are 4 mass. biotechs making noise at the ash conference so far .
it's not clear how well they'll stack up against current migraine therapies, because head-to-head studies haven't been done. .
1243 Used Today
884 Used Today
318 Used Today
254 Used Today
99 Used Today
Discount $10 On Your First Purchases Of $40 Or More
77 Used Today
110 Used Today
273 Used Today
"we were quite surprised to find there were no significant differences," says study author .
it's not clear how well they'll stack up against current migraine therapies, because head-to-head studies haven't been done. .