Siregar, D. I. S., Siregar, M. F. G., Siregar, G. A. and Warli, S. M. (2021) “von Willebrand Factor Gene Polymorphism in Preeclampsia Pregnant at Medan, Indonesia”, Open Access Macedonian Journal of Medical Sciences, 9(A), pp. 1047–1051. doi: 10.3889/oamjms.2021.7732.