Identification and localization of growth factor genes in the sea cucumber, Holothuria scabra oleh Napamanee Kornthong, Teva Phanaksri, Jirawat Saetan, Supawadee Duangprom, Buranee Lekskul, Tipok Vivattanasarn, Sineenart Songkoomkrong, Prapaporn Jattujan, Scott F. Cummins, Prasert Sobhon, Saowaros Suwansa-ard