Table 1: Various etiologies presented by different authors

Name of the authors		Years		The gene responsible
Mardy4		1999		Neurotrophic tyrosine kinase receptor type 1 (NTRK1) gene, located in chromosome 1
Shatzky et al6		2000		Exons 15 and 16 of the TRKA gene
Shalimar7		2007		Exon 16 (V709L and G718S)