MedXshield PO Box 8454 Amarillo, TX 79114 (916) 635-0532 http://www.medxshield.com Info@medxshield.com Biotronix Clinical Engineering Ltd. PO Box 51881 Amarillo, TX 79155 (800) 806-5287 http://www.ctdshield.com inquiry@ctdshield.com