Craenmehr, E Follitropin-beta administered by pen device has superior local tolerance compared with follitropin-alpha administered by conventional syringe. [electronic resource] - Reproductive biomedicine online 2001 - 185-189 p. digital Publication Type: Journal Article ISSN: 1472-6491 Standard No.: 10.1016/s1472-6483(10)62033-0 doi