Quantitative SARS-CoV-2 Spike Antibody Response in COVID-19 Patients Using Three Fully Automated Immunoassays and a Surrogate Virus Neutralization Test. - Kim, Yoonjoo; Lee, Ji Hyun; Ko, Geon Young; Ryu, Ji Hyeong; Jang, Joo Hee; Bae, Hyunjoo; Yoo, Seung-Hyo; Choi, Ae-Ran; Jung, Jin; Lee, Jongmin; Oh, Eun-Jee (Diagnostics (2075-4418), 2021)