Elalfy, K., Roshdy, H., Farag, M., Amer, T., Tawheed, Z., Gaballah, M. A. (2016). 'Prevalence of activated protein c resistance due to factor v leiden mutation in egyptian patients with chronic nonthrombotic venous ulcer', The Egyptian Journal of Surgery, 35(3), pp. -. doi: 10.4103/1110-1121.189433