Girolami, A., & Ferrari, S. (2021). Worldwide distribution of prekallikrein (PK) deficiency: the defect seems mainly concentrated in West African countries and in the United States: Worldwide distribution of PK deficiency:. Mediterranean Journal of Hematology and Infectious Diseases, 13(1), e2021014. https://doi.org/10.4084/mjhid.2021.014 (Original work published December 31, 2020)