ABSTRACT Approximately 80% of the world population experiences some type of back pain at some point in their life. and in 10% of this population the pain causes chronic disability resulting in a high cost for the treatment of these patients. in addition to compromising their work and social interaction abilities. Current treatment strategies include the surgical procedure for degenera... https://www.roneverhart.com/Martin-000-15SM-15-Series-12-Fret-Acoustic-Guitar-p19001/