1. Luo, N., Low, S., Lau, P. N., Au, W. L., & Tan, L. C. (2009). Is EQ-5D a valid quality of life instrument in patients with Parkinson’s disease? A study in Singapore. Annals of the Academy of Medicine, Singapore, 38(6), 521–528.
2. Gao, F., Ng, G. Y., Cheung, Y. B., Thumboo, J., Pang, G., Koo, W. H., et al. (2009). The Singaporean english and Chinese versions of the EQ-5D achieved measurement equivalence in cancer patients. Journal of Clinical Epidemiology, 62(2), 206–213.
3. Luo, N., Chew, L. H., Fong, K. Y., Koh, D. R., Ng, S. C., Yoon, K. H., et al. (2003). Validity and reliability of the EQ-5D self-report questionnaire in Chinese-speaking patients with rheumatic diseases in Singapore. Annals of the Academy of Medicine, Singapore, 32(5), 685–690.
4. Quah, J. H., Luo, N., Ng, W. Y., How, C. H., & Tay, E. G. (2011). Health-related quality of life is associated with diabetic complications, but not with short-term diabetic control in primary care. Annals of the Academy of Medicine, Singapore, 40(6), 276–286.
5. Zhang, X. H., Li, S. C., Fong, K. Y., & Thumboo, J. (2009). The impact of health literacy on health-related quality of life (HRQoL) and utility assessment among patients with rheumatic diseases. Value Health, 12(Suppl 3), S106–S109.