A voucher is a bond of the redeemable transaction type which is worth a certain monetary value and which may be spent only for specific reasons or on specific goods.
In 1985 a robot, the Unimation Puma 200, was used to place a needle for a brain biopsy using CT guidance. In 1992, the PROBOT, developed at Imperial College London, was used to perform prostatic surgery by Dr. Senthil Nathan at Guy's and St Thomas' Hospital, London. This was the first pure robotic surgery in the world.
About the Southern Surgical Association: The Southern Surgical Association was founded by brothers W.E.B. Davis and J.D.S. Davis in 1887 in Birmingham, Alabama. Inspired by recent noteworthy advances in surgery, the Davis brothers solicited involvement of surgeons from throughout the country whom they considered professionals of great eminence.