M Singh, D. R Holmes, R. J Lennon and C. S. Rihal
Circulation: Cardiovascular Interventions 3 ( 5 ): 423 - 430 , 2010
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M Vila, T Kramer, N Hickey, M Dattani, H Jefferis, M Singh and M. E. Garralda
Journal of Pediatric Psychology 34 ( 9 ): 989 - 998 , 2009