Affiliations: Fraser of Allander Neurosciences Unit, Royal Hospital
for Sick Children, Yorkhill, Glasgow, UK
Note: [] Correspondence: Prof. John B.P. Stephenson, Fraser of Allander
Neurosciences Unit, Royal Hospital for Sick Children, Yorkhill, Glasgow G3 8SJ,
UK. Tel.: +44 1417765589; Fax: +44 1412019270; E-mail:
john@jbpstephenson.com