Kim, H., Ku, S., Suh, C., Kim, S., Choi, Y., Kim, J., & Moon, S. (1969). The effect of intracytoplasmic sperm injection on the early hCG level in twin pregnancies. Gynecological Endocrinology : The Official Journal of the International Society of Gynecological Endocrinology. https://doi.org/10.3109/09513590.2011.588754 (Original work published)

Lee, Y., Ahn, S., Kim, K., Suh, C., & Koo, K. (2018). Incidence Rate of Atypical Femoral Fracture after Bisphosphonates Treatment in Korea. Journal of Korean Medical Science, 33(5), e38. https://doi.org/10.3346/jkms.2018.33.e38 (Original work published 2018)