General spine information www.back.com or www.spineuniverse.com

Prestige artificial disc www.prestigedisc.com

DBS Treatment of Parkinson's Disease www.activadbs.com/parkinsons_home.asp

DBS Treatment of Dystonia www.dystonia.activadbs.com

DBS Treatment of Essential Tremor www.essentialtremor.activadbs.com

Mature spine conditions like osteoporosis www.maturespine.com

Up to date spine information www.insidespine.com

Information on neck conditions www.necksurgery.com