Response to: Letter to the Editor regarding: The expanding phenotype of MELAS caused by the m.3291T > C tRNA mutation E. Kelland, C.A. Rupar, Asuri N. Prasad, A. Downie and C. Prasad (1) by Josef Finsterer, MD, PhD [1], Sinda Zarrouk-Mahjoub, PhD [2]. (Molecular genetics and metabolism reports, 2016)