- Correspondence to Dr C McDougall, c/o Neuroscience Publications, Barrow Neurological Institute, St Joseph's Hospital and Medical Center, 350 W Thomas Road, Phoenix, AZ 85013, USA;
- Received January 16, 2015
- Revised March 11, 2015
- Accepted March 18, 2015
- First published April 8, 2015.
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