1. Central venous catheters—no X-rays needed;Hoffman;J Pediatr Surg,1988
2. Electrocardiographic guidance for percutaneous placement of central venous catheters;Luks;Surg Gynecol Obstet,1989
3. CVP catheter electrocardiography;Koscielniak-Nielsen;Acta Anaesthesiol Scand,1991
4. Placement of central venous catheters by cut-down with electrocardiogram positioning;Redo;Surg Gynecol Obstet,1993
5. Accurate placement of central venous catheters;McGee;Crit Care Med,1993