Funding for this research was provided by:
National Research Foundation of Korea (2017R1A2B4012905, 2016R1D1A1B04934970)
National Research Foundation of Korea (2017M3A9G7073033, 2017R1D1A1B03030942)
National Research Foundation of Korea (2011-0030049)
Received: 21 July 2019
Revised: 21 November 2019
Accepted: 13 December 2019
First Online: 7 January 2020
Ethics approval and consent to participate
: The cells were purchased from Lonza [7F3915 (21-year-old female), 7F3674 (22-year-old female), and 127756 (43-year-old male)], Walkersville, MD.
: Not applicable
: The authors declare that they have no competing interests.