R. Hewlett
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A. Osborn,
R. Weller,
K. Salzman,
2003
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R. Emsley,
R. Hewlett,
J. Maritz,
1996,
Psychosomatics.
H. S. Schaaf,
A. du Plessis,
R. van Toorn,
2015,
The Pediatric infectious disease journal.
L. Nel,
J. Pawęska,
L. Blumberg,
2006,
Emerging infectious diseases.
R. Hewlett,
F. Henning,
2008,
Journal of Neurology, Neurosurgery, and Psychiatry.
A. Lochner,
J. van der Walt,
R. Hewlett,
1981,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
A. Lochner,
J. van der Walt,
R. Hewlett,
1981,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
P. Donald,
G. Lammie,
J. Schoeman,
2007,
Acta Neuropathologica.
P. Donald,
G. Lammie,
G. Lammie,
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The Journal of infection.
W. Huk,
J. Lotz,
R. Hewlett,
1990
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B. Brownell,
R. Hewlett,
1975,
Journal of neurology, neurosurgery, and psychiatry.
R. Emsley,
J. Warwick,
G. Jordaan,
2010,
Progress in Neuro-Psychopharmacology and Biological Psychiatry.
R. Emsley,
J. Warwick,
G. Jordaan,
2012,
Metabolic Brain Disease.
J. Lotz,
R. Hewlett,
B. Alheit,
2004,
Neuroradiology.
J. Heckmann,
R. Hewlett,
R. Eastman,
1994,
Journal of neurology, neurosurgery, and psychiatry.
R. Hewlett,
R. Simpson,
1982,
Human pathology.
P. Kirby,
G. de Jong,
M. Greeff,
1987,
American journal of medical genetics.
D. Zaharie,
S. Bardien,
L. van der Merwe,
2009,
British journal of neurosurgery.
R. Hewlett,
C. Gardner-Thorpe,
1978,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
J. Ganz,
R. Hewlett,
1976,
Neurology.
P. Donald,
J. Schoeman,
R. Hewlett,
2004,
Neuroradiology.
G. Rutherfoord,
R. Hewlett,
D. Lamprecht,
2002,
Brain pathology.
P. V. van Helden,
P. Donald,
H. Seifart,
1998,
Pediatric Neurosurgery.
S. Toovey,
R. Hewlett,
M. Britz,
2006,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
A. Osborn,
L. Loevner,
W. Couldwell,
2011,
Neuroradiology.
R. Hewlett,
A. D. de Graaf,
1982,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
S. Andronikou,
J. Wilmshurst,
R. Hewlett,
2003,
Pediatric Radiology.
G. de Jong,
R. Hewlett,
J. Shires,
1986,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.
R. Emsley,
J. Warwick,
D. Nel,
2012,
Metabolic Brain Disease.
A. Osborn,
T. Ellchuk,
R. Hewlett,
2011,
American Journal of Neuroradiology.