The relationship between inpatient cardiac surgery mortality and nurse numbers and educational level: analysis of administrative data.
Van den Heede K, Lesaffre E, Diya L, et al. The relationship between inpatient cardiac surgery mortality and nurse numbers and educational level: analysis of administrative data. Int J Nurs Stud. 2009;46(6):796-803. doi:10.1016/j.ijnurstu.2008.12.018.