Institution: | a Health Metrology Group, Korea Research Institute of Standards and Science, 1 Doryong-dong, Yusung-gu, Daejon 305-340, Republic of Korea b National Measurement Institute of Australia, Pymble, NSW 2073, Australia c Division of Biological, Energy, and Environmental Measurement, National Institute of Metrology of the People’s Republic of China, Beijing 100013, People’s Republic of China d Research and Technology, LGC, Teddington TW11 0LY, UK e National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8563, Japan |