Raghunathan K, Layton JB, Ohnuma T, Shaw AD. Observational research using propensity scores. Adv Chronic Kidney Dis. 2016 Nov;23(6):367-72. doi: 10.1053/j.ackd.2016.11.010
Coon CD, Bokowy KL, Horblyuk R, Zisman RS, McLeod LD, Brown MT. The development and initial assessment of the strategy and leadership systems capability evaluation survey. Health Care Manag (Frederick). 2012 Oct 1;31(4):332-41.
Rothman KJ, Wepsic JG. Side of facial pain in trigeminal neuralgia. J Neurosurg. 1974 Jan 1;40(4):514-6.