Davis A, Mehrotra S, Holl J, Daskin MS. Nurse staffing under demand uncertainty to reduce costs and enhance patient safety. Asia Pac J Oper. 2014 Feb;31(1):1-19. doi: 10.1142/S0217595914500055
Pring CM, Skelding-Millar L, Goodall RJ. Expectant treatment or cholecystectomy after endoscopic retrograde cholangiopancreatography for choledocholithiasis in patients over 80 years old? Surg Endosc. 2005 Mar;19(3):357-60.