(1) Waters TR, Nelson A, Proctor C. Patient handling tasks with high risk for musculoskeletal disorders in critical care. Crit Care Nurs Clin North Am. 2007 Jun;19(2):131-43. doi: 10.1016/j.ccell.2007.02.008. PMID: 17512469. 

(2) Waters T, Lloyd JD, Hernandez E, Nelson A. AORN ergonomic tool 7: pushing, pulling, and moving equipment on wheels. AORN J. 2011 Sep;94(3):254-60. doi: 10.1016/j. aorn.2010.09.035. PMID: 21884845.