B. Wiriyasirivaj and B. Supawattanabodee [Aritcle first published online 18 Oct 2011], “Development and Internal Validation of the Vajira Osteoporosis Risk Score Index (VORSI) for Postmenopausal Osteoporosis Screening”, Vajira Med J, vol. 55, no. 2, pp. 95–109, Oct. 2011.