Oz, M. C., J. Zikria, C. Mutrie, J. P. Slater, C. Scott, S. Lehman, M. W. Connolly, D. T. Asher, W. Ting, and P. B. Namerow. “Patient Evaluation of the Hotel Function of Hospitals”. The Heart Surgery Forum, vol. 4, no. 2, June 2001, pp. E166-E171, https://journal.hsforum.com/index.php/HSF/article/view/6535.