1. Achan V, Tran C, Arrigoni F, Whitley GS, Leiper JM, Vallance P (2002) All-trans-retinoic acid increases nitric oxide synthesis by endothelial cells. A role for the induction of dimethylarginine dimethylaminohydrolase. Circ Res 90: 764–769
2. Afshar J, Pluta R, Boock R, Thompson BG, Oldfield EH (1995) Effect of intracarotid nitric oxide on primate cerebral vasospasm after subarachnoid hemorrhage. J Neurosurg 83: 118–122
3. Allen G (1976) Cerebral arterial spasm: Part 8. The treatment of delayed cerebral arterial spasm in human beings. Surg Neurol 6: 71–80
4. Asano T (1999) Oxyhemoglobin as the principal cause of cerebral vasospasm: a holistic view of its actions. Crit Rev Neurosurg 9: 303–318
5. Blaumanis O, Grady P, Nelson E (1979) Hemodynamic and morphologic aspects of cerebral vasospasm. In: Price T, Nelson E (eds) Cerebrovascular diseases. Raven Press, New York, pp 283–294