1. School of Life Sciences and Biotechnology; Korea Univ.; 5-Ka, Anam-Dong, Sungbuk-Ku Seoul 136-701 Republic of Korea
2. Korea Packaging Center; Korea Inst. of Industrial Technology; Bucheon Republic of Korea
3. Dept. of Stem Cell and Regenerative Biotechnology; KU Convergence Science and Technology Inst., Konkuk Univ.; Hwayang-dong, Kwangjin-gu Seoul 05029 Republic of Korea