Al-Khatib, S. M., Allen LaPointe, N. M., Kramer, J. M., Chen, A. Y., Hammill, B. G., DeLong, L., & Califf, R. M. (2004). 1096-71 A national survey of health care practitioners' knowledge of the QT interval. In Journal of the American College of Cardiology (Vol. 43, pp. A408–A408). Elsevier BV. https://doi.org/10.1016/s0735-1097(04)91724-x

Al-Khatib, Sana M., Nancy M. Allen LaPointe, Judith M. Kramer, Anita Y. Chen, Bradley G. Hammill, Liz DeLong, and Robert M. Califf. “1096-71 A national survey of health care practitioners' knowledge of the QT interval.” In Journal of the American College of Cardiology, 43:A408–A408. Elsevier BV, 2004. https://doi.org/10.1016/s0735-1097(04)91724-x.

Al-Khatib SM, Allen LaPointe NM, Kramer JM, Chen AY, Hammill BG, DeLong L, et al. 1096-71 A national survey of health care practitioners' knowledge of the QT interval. In: Journal of the American College of Cardiology. Elsevier BV; 2004. p. A408–A408.

Al-Khatib, Sana M., et al. “1096-71 A national survey of health care practitioners' knowledge of the QT interval.” Journal of the American College of Cardiology, vol. 43, no. 5, Elsevier BV, 2004, pp. A408–A408. Crossref, doi:10.1016/s0735-1097(04)91724-x.

Al-Khatib SM, Allen LaPointe NM, Kramer JM, Chen AY, Hammill BG, DeLong L, Califf RM. 1096-71 A national survey of health care practitioners' knowledge of the QT interval. Journal of the American College of Cardiology. Elsevier BV; 2004. p. A408–A408.