TY - JOUR AU - Sprik, C; Wirtschafter, J D TI - Hemifacial spasm due to intracranial tumor. An international survey of botulinum toxin investigators JO - Ophthalmology IS - 08 VL - 95 PY - 1988 DO - 10.1016/S0161-6420(88)33044-7 L3 - PubMed-ID: 3266003 SP - 1042 EP - 1045 ER -