Reply: Mutations in TUBB4A and spastic paraplegia. Issue 13 (19th October 2015) - Chamova, Teodora; Kancheva, Dahlia; Guergueltcheva, Velina; Mitev, Vanio; Azmanov, Dimitar N.; Kalaydjieva, Luba; Jordanova, Albena; Tournev, Ivailo