TY - JOUR AU - Hatfield, A. AU - Bodenham, A. PY - 1999 DA - 1999// TI - Portable ultrasound for difficult central venous access JO - Br J Anaesth VL - 82 UR - https://doi.org/10.1093/bja/82.6.822 DO - 10.1093/bja/82.6.822 ID - Hatfield1999 ER -