Mordin M, Anastassopoulos K, van Breda A, Vallow S, Zhang M, Gargiulo K, Hewitt D, Olson W, Sikirica V. Clinical staff resource use with intravenous patient-controlled analgesia in acute postoperative pain management: results from a multicenter, prospective, observational study. J Perianesth Nurs. 2007 Aug 1;22(4):243-55.
Palka P, Lange A, Fleming AD, Sutherland GR, Fenn LN, McDicken WN. Doppler tissue imaging: myocardial wall motion velocities in normal subjects. J Am Soc Echocardiogr. 1995 Sep 1;8(5 Pt 1):659-68. doi: 10.1016/s0894-7317(05)80380-3
Sutherland GR, Stewart MJ, Groundstroem KW, Moran CM, Fleming A, Guell-Peris FJ, Riemersma RA, Fenn LN, Fox KA, McDicken WN. Color Doppler myocardial imaging: a new technique for the assessment of myocardial function. J Am Soc Echocardiogr. 1994 Sep 1;7(5):441-58. doi: 10.1016/s0894-7317(14)80001-1